if you hit it, she would immediately change her facebook status to 'in a relationship with...'
you can tell my looking at her. sexual contract, no doubt.
Aaah - for the pre-facebook, pre-mobile phone casual fuck days, eh?
Now you are photographed, uploaded and written about during the actual date..
When I was young, worst that would happen would be a red mark left by a desperate chick sucking on your neck. Sort of marking their territory. It used to be very easy to fuck a gal and avoid her afterwards. Now - you've got her mom & dad sending you a friend request before she's figured out it wasn't the start of a long-term relationship.