A FWB doesn't have a linear line, it's all about the chemistry you both have that determines it. <br /><br />I've had 3 FWB's. First FWB we didn't really know each other, we are good friends now and he has a wife and a child. second I have no contact with as he was a a-hole, 3rd one we were close friends for years, had too much wine and expressed how we at least fantasized once about us having sex. Then it happened... multiple times and we agreed to be FWB's but once the barrier of affectionate contact broke it was hard to hide it from our friends. They all knew it would happen. Been married 2 years now with a daughter on the way.<br /><br />Again no linear line to what a FWB 'REALLY' means, best you can do is have open communication about what you both expect from each other.