mores
Living In a World of Prudes, Sluts and Nobodies At All
In my experience it feels like there are two crowds, those who are 'cool' and have frequent sexual activity, hookups etc both in and out of relationships (or at least portray themselves as doing so) and those who are 'pure' who have decided at this point to abstain from sex until marriage, who are frequently Christian or otherwise religious. I think there's pressure to fit into one of those groups, either to go out and have lots of sex or to not have sex at all.