"Attempting to go from booty call to relationship is like closing the door after the horse has bolted. The likelihood is that if you did get to know the person, the sex could quite easily take a nosedive, after all if you both had such great personalities, how did you end up leapfrogging the formalities and saying screw getting to know each other, let’s just screw?"
As if that's not enough to pull the chastity belts (or purity rings) out once and for all, you can read more here.
'Nuf said. Speaks volumes.