Maybe for some it's a matter of fitting in. They think everyone is having sex (when actually they're not) so they feel they must too. I know at that age I was like that (wanting to fit in) etc.

I think for guys and some women, it's a numbers game. Another knotch on the belt. I went through that phase. I even dociumented how many men I've slept with and other statistics about them etc.

Could home life have anything to do with this?
Is genetics any way involved? If their parents had sex and/or children at an early age, does that mean their kid will have sex or for women end up pregnant at an early age?

Just curious about some things... good topic.