"Friends with benefits" are friends who, in addition to being friends, agree to have sex. Hang out, talk, with some nookie at the end of the night. "Fuck buddies" are two people who agree to get together for the sole purpose of sex. They do not hang out or talk unless sex is on the line and hence are not friends in the sense that "friends with benefits" are friends But in case we are both BESTFRIEND AT THE SAME TIME AS FUCK BUDDIES