So this guy, he likes this girl who has a big fat booty and boobies, but she's so stupid. But he also likes this girl who is very smart but she's as flat as a ruler and looks so plain that you can put cream cheese on her you could not distinguish her from a bagel.
But he is a doctor and has a degree in cutting people up, so he comes up with a plan to replace the bimbo's brain with the bagel's.