In the right context sex is a good thing where as drugs, cigarettes and alcohol rarely have a positive effect on your life. Abstinence from all premarital sex seems like a Christian value to me and all edgers are not Christian, me included. For some people just abstaining from one night stands might be edge in a scene full of sexual opportunities. I think if the guy is pressuring your daughter to have sex he is a bad boy and your daughter needs to clarify her values to herself and others.