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If you have any doubt whether Daniel Radcliffe is all grown up, just read what the "Harry Potter" star has to say about sex and relationships.

"I'm one of the few people who seem to have had a really good first time," the 25-year-old British actor told Elle magazine about losing his virginity.

"It was with somebody I'd gotten to know very well," he said about his first time. "I'm happy to say I've had a lot better sex since then, but it wasn't as horrendously embarrassing as a lot of other people's were - like my friend who got drunk and did it with a stranger under a bridge."

Radcliffe broke from his boy wizard image when he went full frontal in Broadway's "Equus" in 2008.

"There's something to be said for getting naked onstage when you're 17," he told Elle's August issue, admitting that he was terrified at the time.

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But, in some ways, it made dating easier.

"I went out with quite a few girls at that time. I would normally follow that up with, 'Oh, cool, you've seen me naked,'" said Radcliffe, who skinny dips in his latest film, the romantic comedy "What If."

Now, he's in a grown-up relationship with actress Erin Darke, and confesses that he enjoys "being in relationships more often than being single."

As for marriage, Radcliffe said, "I sort of go back and forth on it. It seems like the most romantic thing you can do is stand up in front of all your friends and say that you love this person."