I assume that it has a lot to do with the part of the brain that makes people want to punch the monkey in those webpage ads.
Everyone knows what's going to happen when you click the ad, but there's still some little part of you wants to punch the ####ing monkey, because the ####ing monkey needs to be punched, and maybe - JUST MAYBE - your punch will be the one that destroys him with a satisfying gore-filled explosion.
