Yesterday as I got on the bus, I noticed a guy  wearing a t-shirt which read simply: "I taught your girlfriend that thing you like." This is one of those shirts which is undoubtedly meant to offend the reader, but it has an element of depth (social-commentary wise) which is most likely not the intent of the designer or the wearer. The shirt proclaims, in short: "I had your girlfriend before you did, and then I left her." In short--your girlfriend, the one who you are (presumably) currently sleeping with, is one which I (the wearer of the shirt) previously was sleeping with, and then discarded .
It goes to show a little something about "sexual experience" and its value. It also says something about the wisdom of taking sex outside the bounds of marriage, or at the least of some long-term (presumably lifelong) commitment--that those who don't value sex enough to consider it an act which should take place within these bounds, also don't really value the person with whom they're having sex. If sex is a total gift of the self--presumably it is at least partially this, if it is something we only do with a person whom we at least tell ourselves we love--the thought of discarding a sexual partner is akin to the thought that we are discarding that person. Such "love" which demands this kind of interaction and then discards it is a lie.
And on the flip side, if the girl in question was so willing to go to bed with somebody for whom she cared little, her willingness to go to bed with her current beau can have scarcely more significance. Yet this interaction is supposedly the gift of her own self: if that can't be held sacred, what then do the promises she makes matter ? And how does a man learn to cherish his wife if he is already in the habit of discarding sexual partners?
 I don't know whether "young man" suits him
 Odds that a person wearing such a shirt actually did sleep with the girlfriend of anyone who reads the shirt: slim to none. On the other hand, odds that somebody has slept with a girl who is not a virgin: 100%.
 The same argument also applies regarding men, since in sexual intercourse each partner makes a gift of himself or herself to his partner.