The Gay Best Friend exists mostly to add variety, funny mannerisms and cheap laughs to an otherwise all-straight story and sometimes shows of political correctness. The GBF may talk about sex a lot, but is seldom depicted as having any , because too many viewers would find that disturbing. Either he has no love life to speak of which never seems to bother him , or it's forever offscreen , only discussed with the heroine over brunch at some pretentious cafe. As modern society grows increasingly comfortable with gay people, fiction is slowly seeing more well-rounded gay supporting characters with onscreen love lives, whose sexuality is incidental to the character. Therefore, do not confuse this for People Sit on Chairs ; if a character is a typical Best Friend character who just happens to be gay, then it's not this trope.