Maybe, as Penny suggests, it is a maturity thing. Maybe the crowd I hung out with in high school was particularly mature, but that is not high on the list of adjectives that comes to mind about them. I know nothing about you, but maybe you hung out with of a crowd of nice, but immature guys. And you all got more successful when you grew up a bit more.My evidence is the same as yours - my own life experience. And by that, I don't mean whether or not I've struck out with girls. My data set isn't me. I meant observing my friends and acquaintances, observing how young adults whom I teach think and act, etc.
If you want to take observations of students, I have a moderately broad set but one that is hundreds of instances. I would not be aware of most one night stands, but I know when my students enter serious relationships. It is damned obvious if you pay any attention at all. And 0% of them have been the wannabe bad boys. Real bad boys aren't in a challenging major in a college setting for long, although a few may it a semester or two.