I'm convinced it exists, and that's a legitamate, and often fruitful option! What other human relationship tagged types of sex are common? Make up sex. Break-up sex. in-love sex revenge sex looking-for-love sex. The list goes on, but I want to comment of friendship sex. I went back to my home town once (I'd been gone for a decade) and met up with a girl I knew in high school. We had never dated, but always knew each other; had friends in common. My visit was for about 10 days. I'll shorten the story to say we started having sex after the 2nd day! And we did it everyday, and sometimes twice a day till I left! We've always been good friends, and we'll continue to be. We both knew that the prospect of a relationship was out of the question. But boy, did we get it on! So really think there is such a thing as "friendship sex"! Do you all agree?