Why are scorpios possessive?

Having a Scorpio love you is the best thing that can happen to anyone.This is not about the sign but about your behavior. Why were you accepting drinks from a strange man in a bar when you went there with your boyfriend? He had every right to be angry, but with you, not with the other guy. It has nothing to do with being a Scorpio and everything to do with him being embarred by your actions. Look at it from his point of view and then you might understand him a little better.