You know, I've been thinking about why some guys are such jerks, and the only thing I can come up with is that for every guy who acts like a jerk, there is at least one girl who has allowed him to get away with it. If girls had better boundaries for expected behavior and didn't tolerate bad behavior, make excuses for it, or ignore it altogether, I bet there would be a reduction in the number of "jerks" out there.
My two cents.