"I probably drink too much, you know," PEOPLE's 2012 Sexiest Man Alive tells GQ in its June cover story.
"My wife, that's what she bought into ... I'm probably a pretty high-functioning, I guess, you know, I would say, alcoholic, I guess. There's probably a tendency to escape. I equate it to creativity, and I definitely equate it to having a good time."
However, the actor, 34, says he did cut back after he and wife Jenna Dewan-Tatum welcomed daughter Everly last year. He also plans not to drink for four months when he makes the Magic Mike sequel.
"Then, at the end of that movie," he says, "it's go time."
It's not just booze, either. Tatum also has a sweet tooth – and is especially fond of cake.
Sebastian Kim / GQ
Although he likes to indulge, one of Tatum's favorite TV shows is the weight-loss competition series The Biggest Loser.
"I really do love it," he says. "It's terrible and it's bad, but I really do think it's because I have an inner fat kid in me. I can completely lose myself into just absolutely satisfying things – a really amazing cheeseburger, a pizza, good fries, a beer. I enjoy being comfortable and eating whatever the hell I like."
Elsewhere in the interview, Tatum talks about wanting to play the Marvel mutant Gambit – "He was the most real to me: smoking, drinking, women-loving, thief. He just looked cool to me," he says – and also reveals that he had an invisible friend when he was a child.
"His name was Boy," he says. "I think I just lived in an imaginary world. I was always playing war in the woods, people are chasing me ... I wasn't doing it because I was desperate for friends. I had friends. I couldn't see features, in a way, but I knew he was there ... I haven't really thought about him in so long."