I remember reading something a while ago about ratio imbalances and what men/women want in a relationship.

In NYC where there are a lot more single women than men, men when interviewed were generally not interested in long term relationships and I think there was more casual sex (there were a lot more single mothers too I think).

In the west coast where there are a lot more single men than women both women and men converged on wanting a long term relationship.

I'll try and find whatever this was - thought it was interesting.