Jeez, where are you guys hanging out? I know plenty of college-aged girls who are neither skanks nor whores.
heheh...really, shh!? send one my way, i'll treat her right 
Maybe you guys are looking in the wrong place, or maybe you are simply attracted to skanks and whores, and therefore assume all girls must be that way.
I know they're not all like that but most of them I know are like that. Heck, even the ones that I thought were not skanks have proved me wrong. One girl that i was friends with, had like 3 b/f's in 4 months. I was like..."Were they bad guys or something?"..she came back with..."I just can't stay long with some guys, and they were too lazy". What kind of an excuse is that?
-to be nobody but yourself in a world which is doing its best, night and day, to make you everybody else means to fight the hardest battle which any human being can fight; and never stop fighting.- e.e.cummings