sex friend. It stands for Sex Friend. It's not a lover or a wife, but a relationship where you enjoy sex. I had a girlfriend but I was feeling a rut, so I made my first sex friend through the app. I was gagged, blindfolded, and creampied...I actually wanted to do that, but I couldn't do it because I thought that if I told her I wanted to give her she would dislike me. But this sex friend is OK. There's no need to worry about reason or appearance. We both had a lot of sex to satisfy our sexual fetishes and sexual desires.