Long time ago I had ATF SP. But when I was upgraded from a client to a friend the sex stopped. She said that she does not charge friends, but is not interested in free sex with me
What's confusing? It's just 2 (or more) people that have common interest or are familiar enough to share personal information, unlike acquaintances. Like any 2 dudes might, but with a way better opportunity to potentially learn something about the other side, or just someone you like to hang out with. I'm confused by your confusion.
Friendship to me is more intimate than just sharing common interests. That is still an acquaintance to me. After having sex with a woman, friendship is ruined. No attraction is a must for me. If there is attraction it changes the guy behaviour same goes for the women too.