A lot of times they don't stick around either, but it's women who are bailing on relationships as much or more than men these days.
I had roommates in college who saw themselves anyhow as Alphas. They left a "trail of tears" behind them from the women they used. I suppose these young coeds thought it ("giving it up" so to speak) was the right thing to do at the time. But it wasn't in terms of the long haul. It was their choice to make (i.e., no X42-style rape involved) and they chose wrongly.
I would not be able to live that way as I believe there is a Judgment Day coming after I die.