FWB in plain words

The abbreviation stands for friends with benefits — sometimes just called "sex between friends." The point is that two people share both friendship and a bed, but don't have couple status: nobody introduces the other to their parents, plans a vacation for two, or expects exclusivity unless they've agreed on it.

Sounds simple, but it usually breaks over the small stuff. One person thinks "friends" means movies on Fridays and talking until 3 a.m. The other thinks it means meeting up every two weeks and that's it. Both put the same three letters in their profile.