BRADLEY COOPER ON DANGLING TESTICLES

Bradley Cooper, one of the stars in the R-rated Vegas bachelor party comedy 'The Hangover,' dished with MovieFone's Tom DiChiara on going blow-for-comedy-blow with Mike Tyson, flirting with Julia Roberts on a plane, having a naked man's junk shoved in his face, and playing gay for "Valentines Day."

On fighting with a naked dude:
"I think it was awkward more for the crew to watch a naked Asian man's testicles dangle in front of my neck 40 or 50 times [laughs]. But for some reason I didn't realize how sort of ridiculous it all was. I know Ken [Jeong, the owner of the Asian testicles]. He's a really good friend of mine. We did a movie called 'All About Steve' together, so it was his idea to be naked, and as he was pitching that to Todd, and it was like, 'Whooooa. Okaaaay.' And then I didn't even have a second thought about it. It wound up really making that scene. I think it's one of the funniest scenes in the movie, actually."

On playing gay for "Valentines Day" (staring Julia Roberts):
"You know, I have a really small role. It's like two days I'm doing on that movie, and it was really just the opportunity to play it with Julia Roberts. I did a play with her about three years ago. And I thought it would be great -- it's a really sort of sweet relationship between these two people on a plane. So it's a quick little thing I'm going to do and be able to work with her on film. I'm excited for that. In terms of the fact that that's the character kind of gives away the -- I don't know why they were able to release that because it kind of ruins the story a little bit. We don't know that he's gay. At least you're not supposed to -- the way I read it. I guess they don't care [laughs]."

Read the full "Bradley Cooper Interview for The Hangover" at MovieFone.com.