The 56-year-old actor opens up in a new interview for W Magazine, dishing on acting, sex, and Florence Foster Jenkins -- but perhaps the best thing we learned is that he's a huge fan of Dancing With the Stars.
"Secretly, deep down, I'd love to do that show -- it's superb," he confesses. "But, damn it, I consider myself too classy."
"I had to learn to dance the Lindy Hop [for Florence Foster Jenkins]," Grant notes of his dance background. "That took four hard months, with ladies in leotards in a sweaty dance studio in London. They had to train me like a performing seal."
While learning to dance was apparently hard for the Notting Hill star, there's another part of his job he can't get enough of -- sex scenes.
"Love scenes are extremely difficult. You're always within a millimeter of sentimentality and 'yuck,'" Grant says, "But sex scenes are something else!"
"The conventional response to sex scenes is that they're horrible and not sexy and it's all so unnatural. But I've always found filming sex scenes to be quite a turn-on," he reveals. "I like the experience of being in a sexual position when you're not supposed to be in one."
Though Grant admits to being turned on by sex scenes, he's not one for marriage.
The actor, who made headlines in 1995 when he was arrested after being caught with a prostitute while he was dating actress Elizabeth Hurley, has never married -- although he has welcomed four children over the last four years (with two different women).
"Do I think human beings are meant to be in 40-year-long monogamous, faithful, relationships? No, no, no. Whoever said they were? Only the bible or something," Grant told Howard Stern last month, adding that he thinks affairs can "keep marriages together."