Neil Patrick Harris fell in love with David Burtka all over again after they had children.
The 'How I Met Your Mother' star, who welcomed twins, Gideon and Harper, into the world in 2010 via a surrogate mother, says watching his fiancé, 39, interact with their son and daughter has made him appreciate David more.
Speaking about the secret to their long-lasting relationship, the 41-year-old star told the September issue of Glamour magazine: "I think you have to find new elements that turn you on, and not only sexually. Having kids was one of those great moments for me.
"Watching David become another level of person, mastering this other domain, made me look at him with a whole other set of appreciative eyes. That sort of made me re-fall in love with him."
Neil, who confirmed he is gay in 2006, also admits he felt "unsettled" during sexual encounters with women when he was younger.
He said: "In high school all my friends were sleeping with girls, and it just seemed like that's what one did. So therefore that's what I did, but it left me feeling unsettled, as if I had somehow done it wrong. That's not a good feeling."
He added: "But now I think it's easier to avoid that fate. Today, it's cool to see a happy lesbian couple who are high school juniors. Better that than have those two girls marry people they're not attracted to, have three kids, and then come out when they're 50."

Ciara says she feels "a whole new spiritual energy" after splitting from fiancé Future.
The 28-year-old singer, who dumped the rapper after she reportedly found out he was cheating on her, plans to express all of her feelings through her new music and insists she is "very, very happy."
The 'Goodies' hitmaker, who has three-month-old son Future Jr., told UsMagazine.com on Tuesday (12.08.14), one day before news of their breakup hit the headlines: "I'm in a much more clairvoyant place in my life. So, I want to express that through my music."
She added: "I think that when you become a mom... you don't really worry about the small stuff. I'm just way more centred. It makes you focus even more on what your goals are in life. And I just feel a whole new spiritual energy that's happening."
Ciara plans to "stay focused" on her career and insists she "can't waste time" on things that don't matter to her.
She said: "My son has been the best thing that has happened in my life. He has been amazing and he is truly heaven-sent. And so, I just feel all that love.
"I want to be one of those moms and women that when I look back, I know that I always stayed focused. It's about keeping your eyes on the prize. Before I had a child, I had goals. And I still have to accomplish those goals, but now that I have a child, I have more goals to accomplish. So I can't waste time. I have to go for it. It's actually pushing me harder, and forward."
Speaking about motherhood, she added: "It's a great thing. I wouldn't trade it for the world, and I'm very, very happy."

Carrie Underwood is in talks to perform at the half time show of the 2015 Super Bowl.
The 31-year-old former 'American Idol' winner is tipped to be the musical act at the NFL Super Bowl XLIX, held at the University of Phoenix Stadium in Glendale, Arizona, on February 1 next year.
Sources told sports gossip blog www.TerezOwens.com that the 'Blown Away' hitmaker will most likely headline the event, which is one of the biggest in America, watched by an estimated 114 million every year, as football fans already know her from 'Sunday Night Football,' and organisers are confident that country music is now mainstream.
An official announcement isn't expected to be made until early next month.
Super Bowl performances usually feature a number of special guests and Miranda Lambert could join Carrie onstage, as they recently released their duet, 'Something Bad.'
Bruno Mars performed at last year's event alongside the Red Hot Chili Peppers, while Beyoncé Knowles was joined on stage by her former Destiny's Child band members, Kelly Rowland and Michelle Williams, during her performance in 2012.
Other past performers include Madonna, whose show proved to be controversial when special guest star M.I.A. stuck her middle finger up to a live TV camera.

Christina Aguilera wants to unveil her post-baby body in Playboy.
The 'Your Body' hitmaker, who recently posed nude to show off her growing baby bump on the cover of the latest issue of V magazine, is reportedly eager to strip down again after she gives birth to her second child and gets back in shape.
A source close to the 33-year-old star, who already has a six-year-old son, Max, told In Touch Weekly magazine: "She wants to do Playboy. This is something she wanted to do even before she got pregnant. Christina's always loved her body."
The 'Voice' USA mentor, who lost 20 pounds last year after embarking on a strict diet and fitness regime, is said to have hired a nutritionist to help her maintain a healthy weight throughout her pregnancy and plans to get back to her pre-baby weight before agreeing to bare all in the magazine.
The insider said: "It won't be too hard. She even hired a nutritionist.
"She's determined to do this. Christina is planning to show off her assets."
The blonde beauty, who is engaged to Matthew Rutler and is expecting a baby girl, recently said she is "proud" of her figure.
She said: As a woman, I'm proud to embrace my body through all stages of life, staying fearless and confident in surrendering to the unknowns the future has in store."

Kris Jenner is happy that Kim Kardashian West is moving "right around the corner" from her.
The 'Keeping Up with the Kardashians' star is thrilled her daughter, who moved into her home in Calabasas, California last year, recently bought a new $20 million mansion in nearby Hidden Hills with husband Kanye West, as she was upset about their original plans to live in Bel Air with their 13-month-old daughter, North.
Asked when the couple is moving out, the 58-year-old family matriarch told E! News: "Oh god somebody tell me, just kidding Kim. I thought when she got this new house that she would be moving right out and I was getting a little sad about it, but then realised that North, her and Kanye have lived with me for almost a year and a half now, so it's been a really wonderful time, but they're going to be right around the corner so I feel better about that."
The couple moved in with Kris before North's birth in June 2013 in order to renovate an $11 million home in Bel Air.
They recently decided to put that property on the market and bought their lavish new home, as they got fed up of waiting for the extensive work to be completed.
Kris is very happy they are no longer moving almost an hour away.
She said: "Well that's why I'm happy now. [It's] right down the street. I can walk there."

Robin Williams will be honoured during a special segment at the upcoming Emmy Awards.
Organisers of the 66th annual event, set to take place in Los Angeles on August 25, plan to include plenty of tributes to the 63-year-old actor, whose body was discovered by his personal assistant at his home in Tiburon, California on Monday (11.08.14) after he committed suicide.
Executive producer of the star-studded ceremony Don Mischer told PEOPLE.com: "Plans for the In Memoriam segment are in discussion. While we are all still coming to terms with this week's tragic news, we are working to give Robin Williams the proper and meaningful remembrance he so well deserves."
The In Memoriam section of the ceremony usually pays tribute to Hollywood stars and respected members of the film industry who died over the previous year.
The 'Mrs. Doubtfire' star's family members and close friends have started planning the Oscar-winning actor's private funeral and a public memorial is also in the works.
A source recently said: "Everyone is obviously just stunned that Robin committed suicide . . . his family is holed up together and beginning to make plans for a very private funeral.
"There will most likely be a public memorial to celebrate his life that his fans can be a part of."

Kim Kardashian West says Kanye West has inspired her to be more outspoken and real.
The 33-year-old reality TV star, who married the rapper, with whom she has 13-month-old daughter, North, in Italy in May, claims she has zero time "for anything else but the truth" these days.
Asked if she has become bolder since becoming a mother, the 'Keeping Up with the Kardashians' star said: "Yeah, I think so. I think when you have a baby there's like no time for any like s**t. Excuse my language. You don't have time for it and sometimes I see things and I'm like, 'I'm not gonna let that slide. This person was wrong.' Or whatever I'm feeling I speak my mind a little bit more after I've had our daughter."
She added: "I don't know if it's a combination of being married to someone that's super honest and open and says whatever he wants whenever he wants to or just not having time really for anything else but the truth and just being real."
Despite admiring Kanye's honesty, Kim, who says North first started calling the 'New Slaves' hitmaker "daddy and dad" at seven months old, doesn't always understand what her husband is saying during some of his infamous on-stage rants.
She told 'Watch What Happens Live': "Nothing that he says would embarrass me. There is some times where he would talk about something that I might not understand the point that he's really trying to get across and then I really understand it after the fact, and I totally believe in him and what he's saying. It's really cool to see that he just speaks the truth so I respect his rants and I like what he says."

Robin Williams was reportedly sleeping up to 18 hours a day before his death.
The 63-year-old actor, whose body was found by his personal assistant after he hanged himself at his home in Tiburon, California on Monday (11.08.14), also "wasn't eating" in the weeks before taking his own life due to his severe depression.
A source told gossip website RadarOnline.com: "Robin had been suffering from depression and would often sleep a majority of the day and night. His bedroom had black out curtains, because Robin didn't want light in his bedroom.
"He wasn't eating and was just having problems getting out of bed. He would often complain that he was just so tired, even after sleeping 20 hours."
The 'Mrs. Doubtfire' actor sought relief from his personal struggles in his work for much of his life.
The insider said: "Robin's comedic talent came from the sadness he had in his personal life . . . the laughter was his coping mechanism.
"He had been battling depression for most of his adult life . . . it was always there."
Family members and friends have started planning the Oscar-winning star's private funeral.
The source said: "Everyone is obviously just stunned that Robin committed suicide . . . his family is holed up together and beginning to make plans for a very private funeral.
"There will most likely be a public memorial to celebrate his life that his fans can be a part of."

Kristin Cavallari wants another baby.
The former 'The Hills' star, who has sons, Camden, two, and Jaxon, three months, with her NFL star husband, Jay Cutler, admits "motherhood is a lot of work" but hopes to expand their family in the future.
The 27-year-old jewellery and shoe designer told Chicago's Michigan Avenue magazine: "We love having kids, so I do think we'll end up having another one but then we're done."
She added: "Being pregnant for a full nine months isn't the best thing in the world."
The blonde beauty has her hands full with her youngest son, who hasn't settled into a regular sleeping schedule yet.
She said: "He's a happy baby, except that he's not a great napper, so I'm working on trying to get him to take better naps right now which is all I can really ask for.
"When Camden's going down, Jax is just waking up to eat and play, so there's literally no time. You have zero time to yourself."
But Kristin feels much more confident with her second child.
She said: "Well, it's a lot easier in the sense that you know what to do and expect, so you have a lot more confidence.
"Plus, you're definitely more relaxed with the second one because you're not stressed out by questioning everything that you're doing."

Usher claims getting married is the "best mistake" he has ever made.
The 'Good Kisser' hitmaker, who has two sons, Usher Jr., six, and Naviyd, five, with ex-wife Tameka Foster, insists he has no regrets about tying the knot with her in 2007 even though they divorced two years later.
Asked about his best mistake, the 35-year-old star told the September issue of O magazine: "Getting married at 28."
He added: "Most people probably think I regret it because I ended up getting divorced, but it helped me learn that sometimes I think I know more than I actually do."
The 'Voice' USA mentor secured primary custody of his children in 2012 after a bitter court battle with former celebrity stylist Tameka.
The 'More' hitmaker previously said his sons are his "most prized possession."
Earlier this year, he said: "They are my greatest investment, my most prized possession, it's everything."
Tameka, 43, previously confessed she "nagged" Usher a lot during their marriage because she struggled to cope with the pressure of being in a high profile relationship.
Explaining the reasons for their split, she said: "Pressures from the public, you know. But then I did dumb stuff. I made a lot of mistakes. He always told me, 'You gotta drink a lot of milk.' You know, you gotta toughen up because I wasn't ready for the scrutiny. And then to just hear the things people would say about me, it hurt me a lot. And I think I nagged him as a result of what I was going through."

Kim Kardashian West says Adrienne Bailon "has good intentions."
The 33-year-old reality TV star, who recently lashed out at the former The Cheetah Girls singer on Twitter after she claimed her two-year relationship with Kim's younger brother, Rob Kardashian, had hurt her career, hinted their feud was merely a misunderstanding and they have since buried the hatchet.
Asked if she would prefer to have Adrienne or Rob's other ex-girlfriend Rita Ora as a sister-in-law, she told 'Watch What Happens Live' on Tuesday night (12.08.14): "I would say Adrienne Bailon because she was in our lives for a long time and I know she's a really sweet girl, she has good intentions and she has a good heart."
Kim previously blasted Adrienne, 30, for telling a magazine that she regretted appearing on 'Keeping Up with the Kardashians' when she was dating Rob, 27, from 2007 until 2009.
She said: "To be stuck with that Kardashian label, that was so hurtful to me and to my career. I probably realised that too late - not that it would've affected my decisions in terms of who I dated, but it would've affected my decision to appear on the show."
A furious Kim later tweeted: "Funny how she says being with a Kardashian hurt her career yet the only reason she has this article is bc she is talking about a Kardashian
"So sad when people try to kick my brother when he is down #FamilyForever (sic)"

Gwyneth Paltrow is reportedly dating Brad Falchuk.
The 41-year-old actress, who announced her split from Chris Martin in late March after 10 years of marriage, has been swept off her feet by the 'Glee' co-creator.
A source told Us Weekly magazine that things between the Oscar winner, who has appeared on five episodes of the series since 2010, and the 43-year-old executive producer, who split from his wife of 10 years, Suzanne, early last year, "started off professionally," but their relationship recently evolved into something more.
The rumoured new couple were spotted enjoying a two-hour romantic dinner at East Borough in Los Angeles recently, where an eyewitness said: "It was flirty."
They also spent some quality time together after flying to Utah for a weekend in late July.
Gwyneth and Coldplay frontman Chris, 37, who have daughter Apple, 10, and son Moses, eight, together, have frequently insisted they are still "very close" friends.
The pair, who are neighbours in LA, fuelled rumours of a reconciliation in recent weeks, as they have been spotted numerous times together in the Hamptons in New York.
But last month, the 'Magic' hitmaker insisted: "The truth is...well, I don't really love talking about this stuff. But the thing we told everyone at the beginning of the year is true. We are very close. We are not together. But we're, you know, that's the truth and that's it."
He added: "You know, there's a lot of love. No scandal, I'm afraid. I wish I could give you scandal."