Gender imbalance and the hook-up culture

I'd wondered whether these two trends were fueling each other. Sure enough, when you have 2 girls for every boy at a school, bad social behavior follows. So what's going to happen in China when you have an entire culture with this sort of gender imbalance? Post-WWI France essentially legalized and encouraged the vastly outnumbered men to have mistresses. I guess that's one answer to channel the potential bad behavior, though I don't think that answer will work in too many other places.

http://chronicle.com/weekly/v54/i46/46a02301.htm?utm_source=pm&utm_medium=en