Colin Farrell was "terrified" when he first had sex sober.
The 37-year-old actor had a very "gentle" experience with a woman after giving up drugs and alcohol eight years ago but found it nerve-wracking because it was so new to him.
He said: "I made love to a woman about two and half years after I got clean, and it was one of the most terrifying moments of my life. It was in the afternoon. The windows and the curtains were open. It was lovely, and to be crass, it wasn't f**king. She was very gentle. But it was terrifying.
"Because I was just used to drunkenness and dark rooms and clubs and toilets and wherever.
"I worried I wouldn't be able to talk, full stop. I hadn't uttered a word sober in about 15 years."
In 2005, the 'Winter's Tale' star - who has children James, 10, and Henry, four, from previous relationships - was offered $5 million for the rights to a sex tape he made with Playboy Playmate Nicole Narain but he sued his former fling to stop the sale and distribution of the footage, though it was later made available online.
Colin says he took action because he found making the video "horrifying" and was worried his mother might accidentally stumble across the raunchy footage.
He told the new edition of America's Elle magazine: "It certainly wasn't a validation of my prowess. The whole thing was horrifying. You know, press record. Taboo. Isn't this interesting?
"I was deposed for four hours explaining why I didn't want it to be released. God forbid it's an on-demand movie in a hotel room and my mother says, 'Oh, I haven't seen this work of my son's,' and hits purchase."

Alison Brie is "a dirty birdie".
The 31-year-old actress provides a voice in animated family film 'The LEGO Movie', much to the amusement of her friends, who say she is less-than "wholesome".
Talk show host Chelsea Handler said: "This is a very wholesome movie for you to be in, because I know your history. Your personal history. I do, and she's pretty dirty birdie."
Alison replied: "See, you know that about me. And people in my personal life and history know that about me, but I never play risqué roles."
However, the 'Man Men' actress admits she had a very bizarre raunchy scene in one of first movies, 'Born', which she described as "a totally B, hilarious, like so bad it's good horror movie."
Speaking of a scene in the 2007 film, she recalled to the talk show host: "While I'm having sex, with this really hot Swedish guy I get possessed. While I'm super pregnant cause the demon foetus possesses me and you know I need, penis. And so I'm having sex with him, and while we're having sex I get possessed and my demon fetus inside me bites his penis off. And he dies."

Amber Heard wore a "condom dress" in '3 Days to Kill'.
The 27-year-old actress - who is engaged to Johnny Depp - admits shooting the movie wasn't always comfortable because of adverse weather conditions and the uncomfortable costumes she donned to play Agent Vivi.
She said: "We filmed in the winter in Paris. It was about 20 degrees on the best day and I was literally wearing dresses made out of the same material condoms are made out of. I'm not kidding, there's this incredible latex designer who does a line of latex dresses. They were as weather protective as a condom would be.
"It's snowing and icing. They had to keep throwing hot water on the cobblestones because it was freezing over. It was raining and snowy, there was ice all over the cobblestone streets and I'm wearing six-inch unbroken-in Louboutins and Jimmy Choos and I'm in a condom dress and a long blond wig. Did I mention it was snowy and cold?"
Amber also revealed she is "dying" to go to a country dancing night at Los Angeles gay bar Oil Can Harry's.
She told E! News: "I'm dying to go. Every week, I try to make plans with my gays to go and every week something happens and I can't go. I'm dying to."

Jude Law hid behind a masquerade mask at The Box nightclub's birthday party in London on Wednesday night (12.02.14). The 41-year-old actor donned the gold mask for fun at the exclusive bash to celebrate the nightclub being open in the UK capital for t...

Britain's Countess of Wessex visited St. Thomas Hospital yesterday (12.02.14).
The 49-year-old royal - who is married to Queen Elizabeth's youngest son Prince Edward - stopped by the DEBRA clinic, which treats patients with a rare condition that causes their skin to break and blister at the slightest touch, at the hospital in Westminster, London.
During the visit, Sophie - who is a patron of DEBRA - met patients and staff in the Epidermolysis Bullosa (EB) unit, before being given a tour of the National EB Laboratory, which is the only lab in the UK that can diagnose all forms of the condition.
Henry George, 20, who was diagnosed with the condition when he was just a few days old, gave The Countess a bouquet of flowers upon her arrival.
He said: "It was great to meet The Countess, and brilliant that she is supporting DEBRA so they can continue their vital work.
"I am extremely grateful to the specialist EB nurses and the rest of the EB medical team for enabling me to live as normal a life as possible. Because of their expertise, they are helping me to achieve my goals, get on with life and look positively to the future."
Dr Jemma Mellerio, consultant dermatologist at Guy's and St Thomas' NHS Foundation Trust, said: "It's been an honour to have Her Royal Highness visiting our clinic today. We hope we've given her a real insight into the pioneering work we are doing to help our patients.
"We're very lucky to have such a strong relationship with DEBRA. Their funding enables us to carry out pioneering research and provide the best care to our patients."

Sir Cliff Richard and Sir Tom Jones are to support Morrissey on his US tour.
The 54-year-old singer has announced he will perform two dates at two huge arenas in Los Angeles and Brooklyn this year, and will be supported by the veteran performers.
The former Smiths frontman will take to the stage with Sir Tom and Missouri singer Kristeen Young on 10 May at Los Angeles Sports Arena, before performing with Sir Cliff and Kristeen on 21 June at New York's Barclays Center.
The Welsh singer, 73, took to his official Facebook page earlier today to confirm the news.
He wrote: I will be Morrissey Official's special guest at his show at the LA Sports Arena on May 10th. We hope to see you there! (sic)".
These are the first confirmed shows for Morrissey after he abandoned a series of tours last year due to lack of funding and a bout of sickness.
Meanwhile, Morrissey, who has been without a label since 2009, recently signed a deal with Universal Music's American-based Harvest Records to release his tenth studio album.
The album is due to be released in the second half of 2014.

Sarah Harding believes her solo album will be "controversial".
The former Girls Aloud singer has been working on her own material following the split of the band last March and she insists her upcoming music will be "honest" and have an "edge" to it.
She told The Sun newspaper: "The odd swear word doesn't harm anyone, does it? I love pop, but with an edge so that's what I'd say my music is. And quite controversial."
She added: "My songs are very confessional and honest. You have to be able to relate to what you're singing otherwise you're just a mannequin. That's not at all what I felt in Girls Aloud, but obviously it's different in a band."
The 32-year-old star - who checked into rehab in 2011 for depression, alcohol addiction and prescription drug abuse - has enlisted her boyfriend Mark Foster - who she has known for 17 years - to help produce the tracks after he came back into her life last year.
She explained: "I really can't wait for people to hear the music, I think they'll be surprised. I didn't write it all my myself, but I definitely had more input, which felt good."
The blonde beauty admits her former band mates, Kimberley Walsh, Nicola Roberts, Cheryl Cole and Nadine Coyle, are yet to hear her new album, but insists she's still in contact with all of them.

Alison Goldfrapp wants to take her fans on an "emotional journey".
The Goldfrapp singer has produced a short film inspired by her latest album 'Tales of Us' and says working on music and film both come from a desire to "create narrative and atmosphere".
She said: "For me personally, they both come from a similar desire to create narrative and atmosphere, and to take the listener/viewer on an emotional journey.
"I have always been a huge fan of film and it's often had an influence on the music we've written, particularly for the latest Goldfrapp album 'Tales Of Us'."
Alison says the record was influenced by several novels she was reading during the writing process, as well as the movies she was watching.
She said: "The inspiration came from reading lots of noir-style novels, from authors like Patricia Highsmith and Dorothy B Parker. Also, the novel 'Annabel' by Kathleen Winter.
"I love to watch film too so visually and musically both these mediums had a huge influence on this particular album. I was interested in the central characters in these books and films. This inspired naming each track on the album by the person's first name."
Alison will be at the BFI in London tonight (13.02.14) as part of the BFI Screen Epiphany, where she will introduce and premiere her new short film inspired by 'Tales of Us'.The BFI Screen Epiphanies in partnership with American Express showcase inspirational films hosted by a prominent figure from the arts and culture community.
This event is just one example of the enriched experiences available to American Express Cardmembers at some of the UK's most sought after entertainment events. For more information, visit amex.co.uk/potential.

Marvel Studios are planning a movie based on Scarlett Johansson's Black Widow character.
The 29-year-old actress first portrayed the popular Marvel comic book character - who is also known as Natasha Romanoff - in 2010's 'Iron Man 2' before reprising her role in 2012's 'The Avengers', and is once again set to hit the big screen as the superhero in 'Captain America 2: The Winter Soldier' and 'The Avengers 2: Age of Ultron'.
President Kevin Feige confirmed the prospect of a solo film since audiences still have more to learn about Johansson's alter-ego.
Talking to Total Film magazine about the forthcoming films which feature Black Widow, he said: "We learn more about her past and learn more about where she came from and how she became in that film.
"The notion of exploring that even further in her own film would be great, and we have some development work with that."
Johansson thinks a Black Widow film would be "totally awesome" and insists it would be different to the other comic book films which have already been released.
The Hollywood beauty previously said: "I personally think there's an awesome Black Widow movie in there. A kind of 'Bourne' film that would take the whole comic book genre in a completely different direction. It'd be awesome.
"I've spoken to Marvel about it and Kevin Feige, and there's so much story to draw from, I think it'd be totally awesome."

'Utopia' will be adapted for American television. HBO is set to re-work Dennis Kelly's conspiracy thriller, which will see acclaimed director David Fincher spearheading the project along with Gillian Flynn, who is on board to write the script as part ...

Sir David Jason and Nicholas Lyndhurst were among the mourners at Roger Lloyd-Pack's funeral today (13.02.14).
The 'Only Fools and Horses' stars paid tribute to their late co-star - best known for playing Trigger in the hit sitcom - who died last month following a battle with pancreatic cancer.
Many of Roger's friends and family joined his actress daughter Emily Lloyd at the funeral, which took place at St Paul's Church in Covent Garden, London.
David and Nicholas - who played Del Boy and Rodney in the classic show - were joined by fellow 'Only Fools and Horses' stars John Challis, who played Boycie, Sue Holderness, who played Marlene Boyce, and Paul Barber, best known for playing Denzil.
Roger's pals Kathy Burke and Nigel Havers were also among the mourners who paid their respects.
The late star's coffin was brought to the north London service in a pink hearse.
David, 74, previously paid tribute to his popular co-star, saying: "I was very saddened to hear of Roger's passing. He was a very quiet, kind and unassuming actor who was a pleasure to work with.
"Although he played the simple soul of Trigger in 'Only Fools and Horses', he was a very intelligent man and a very fine actor capable of many roles. I shall remember him with fondness and for all the good times we had together."

Keith Duffy hopes Perri Kiely is too ill to compete in the 'Splash!' final this weekend.
The Boyzone singer has joked that the Diversity dancer, who is feeling under the weather ahead of the diving competition's grand finale on Saturday (15.02.14), is such huge competition he hopes he isn't able to take part.
He quipped on ITV's 'Lorraine' today (13.02.14): "Hopefully he stays kind of ill, he's too good!"
Keith, 39, is joined in the final by Perri, 'The Only Way is Essex' hunk Dan Osborne and athlete Richard Whitehead, and he feels like he is the "old man" among the finalists.
He said: "I didn't realise that I'd be competing with guys like 18 years younger than me, I'm the old man in the panel!"
The Irish star suffered an embarrassing wardrobe malfunction during his first dive in the competition, when his swimming trunks came down while he was in the water.
Keith thinks his flesh-baring moment could have been the reason for his success so far, however.
He quipped: "My wife wasn't too pleased, I have to say. But you reckon that's the reason I'm [still] here?"
The 'Splash!' final airs on ITV on Saturday and the show's sponsor, Hula Hoops, is celebrating the final episode by giving away a year's supply of the tasty snack to lucky viewers.
If one of the contestants scores a perfect 10 in the final, fans are encouraged to tweet the hashtag #Perfect10 to @HulaHoopsUK. The first 10 people to do so will win the year's supply of Hula Hoops.