Let's say you are in a bar. The bar becomes very quiet. A gang walks in. The leader of the gang walks up to you. Word on the street is that he's gay, and he has been arrested (but never convicted) of rape several times.A compliment is a polite expression of praise or admiration. When is it impolite to compliment someone on their appearance?
He looks around the bar. Then he walks up to you, looks at your butt, and says "you're cute. I like you." Then stands there.
Are you going to take that as a polite compliment on your appearance?