Why is it that when you give a guy an ego they dump you?

Men are Dog's plain and simple. She should of keep what she had to her self, and not brag how big is man hood was and such.... He should of been a real boy, and should of not let all the remarks get to his head, and wreck a girl's heart! Girl Friend I am telling you this was best... It is better to find out sooner then later of what this guy was, and another thing it didn't make him or her look classy by taking how big or tight each others lady or man hood was. The less people know the better. Trust me been there done that.