Can women tell if a man has sex?

Can women tell if a man has had sex?<br><br>This guy I was dating had a baby a few months ago, and the mother was a chubby girl. I was talking to an ex of his, and I asked her if she could tell if she was "naive" when they first had sex. She said yes. She was asked the same question about me, and if she thought that I was "naive" as well.<br><br>This is the thing, I've never had sex in my life. She said that "you can tell if a guy's had sex." Based on her opinion, I think she believes that I've had sex because she said "yes" to the question.<br><br>Wondering if she's a weirdo or if it's true.