The Little Britain star, who is married to supermodel Lara Stone, admits he often acts "camp" and "effeminate" even though he is heterosexual, but he now reveals he found himself sexually confused during his youth.
He writes about his experiences in new autobiography Camp David, and tells British newspaper The Sun, "I know there is fascination with me because I'm camp, yet over the years I've been connected to some very beautiful women.
"I've married a supermodel yet there I am on Britain's Got Talent with Simon Cowell, camping it up... I guess I'm just very honest about my sexuality. I had gay experiences as a child and remember being very confused about that...
"But I'm glad I talked honestly about my childhood sexual awakening because I think there's plenty of other people out there who will be reading it and say, 'That's quite normal, that happened to me. It confused me too.'
"I've always been effeminate, and I think people confuse effeminacy with homosexuality, like they go hand-in-hand. But there are plenty of effeminate people who are straight, and plenty of butch people who are gay. I've always been camp, I've always been drawn to playing Wonder Woman in the school playground. I'm not worried about it, it just seems other people are."