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"My mom's a sex therapist, so she's great at talking about relationships," the O.C. star, 25, tells the new InStyle spinoff Your Look in its spring issue.
"She knew the day after I lost my virginity. Oh, yeah. She starting talking to me about sex. She said, 'It happened last night, didn't it?' I was like, 'How did you do that?!' She did the whole mom thing, of course: Use condoms, etc. Weird, but helpful."
But Bilson, whose three-year relationship with costar Adam Brody, 27, ended in December, has learned a few things about guys on her own.
For one thing, she says: "They have different body parts."
She also suggests a trick for telling whether he's the one: "If you're scared he's going to try and kiss you, it's probably not right," she says. "If you really want him to kiss you, he's the guy."
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She will share one secret though – how to fake a killer figure. Bilson, who insists, "I don't feel any pressure to be thin. I like to eat," tells the magazine: "On the red carpet, there's definitely a stance. My chin goes higher, and I automatically put one hand on my hip to give my body shape."


















