Pitchers who do this are under the delusion that they have the right to mete out punishment to batters for such minor offenses as acting a little too cocky, or swinging at a 3-2 pitch when the batter's team is leading by 10 runs. Sometimes they do it just because they are frustrated that the batter gets a lot of hits off them. They do not deserve to be in the major leagues. They do deserve to have their asses kicked by 'roided up hitters who charge the mound after being thrown at.
Person 2: What!? Wasn't she already with 10 other guys already, AND had sex with all of them?
Person 1: Yeah, she must be a serious Head Hunter.
Your mom's inside, headhunting for some dick.