I define sex a lot broader than which parts go into which hole. The key is sexual excitment. If they're getting payed to give up time to make others sexually excited in person, then it's prostitution. I have a friend who worked as a male prostitute a while. The sex was just at the very end of the "date". Those women wanted to be seduced, with dinner and dancing and things like that. Most of it could hardly be defined as sex, but sure as hell got them excited. and they where willing to pay for it.