Katy Perry is pretty much synonymous with sex appeal.

Yet in a revealing new interview with Complex magazine, the "I Kissed a Girl" singer says she's not entirely comfortable in the role of pinup girl.

"I didn't know how to use my curves growing up. I was a little boxier," Katy confesses. "But now I understand that I have that curvy thing ... I'm not like Jennifer Lopez or Kim Kardashian, but it's there. That hourglass is in there someways."

The pop star says her pinup body helped snare her beau, Gym Glass Heroes front man Travis McCoy: "I'm probably going to get in trouble for saying this, but he said he was never a boob guy - he was always a butt guy - until he met me."

TMI, Katy, but thanks for sharing.

Katy Perry also says she's less promiscuous than her party-girl persona.

"For me, it's not a pastime, going out and meeting people and trying to hook up with people," the 24-year-old says. "That actually makes me feel disgusting."

"From a really early age, I was always really sensitive to that. Getting your flirt on is the best thing in the world," admits the singer. "But when it comes to sharing bodily fluids with a person I don't know - then no thank you."

Words to live by. Click to enlarge Complex's Katy Perry pictures ...