It's tricky. I for one do not employ duplicitous tactics such as fronting like I am looking for something serious form the woman. I hate doing that.
Younger women tend to have lower levels of testosterone than older women. They are more fickle and driven by their estrogenic emotions, such as the one to settle down and trap a man into a relationship so she can ahve a solid resource base to ensure secutiry for her and her unborn child.
My suggestion is you keep you eyes out from two types of women: cougars and drunk college chicks. Drunk college chicks, fresh out of high school, seem to be down to experiment and have a good time. They aren't in a jaded phases yet where they think they want a good man to be tame for them. They just want to have fun. Eventually they usually get f'ed alot then realize that it is not fun being a slvt. You must catch them in this phase, before they move onto the "I hate men" phase.
Cougars, however, have grown up, their estrogen has dropped while their testosterone has been driven up, along with their sex drives. These women will maul you. They are great in bed and fun to hang out with, especially if you drink.
There are, of course, exceptions to these rules, but by and large I think it is safe to say that most younger women, subconciously at least, are looking for one man to tie down. Oftentimes they are more willing to play with other men once they have him. Anyone read the book "Sperm Wars"? I just ordered it form Amazon. Looks good.