Somethin' wrong with his medulla oblongata

Professor:

Now, is there anyone here that can tell me why... most Alligators are abnormally aggressive? Anybody? Anyone? Yes, sir. You, sir. Bobby Boucher:
Mama says that Alligators are ornery... 'cause they got all them teeth but no toothbrush. Professor:
[Chuckling]
Yo mama said, Alligators are ornery 'cause they got all them teeth... and no toothbrush. Wow! Anybody else? Yes, sir. You, sir. Student:
Alligators are aggressive because of an enlarged medulla oblongata. It's the sector of the brain which controls aggressive behavior. Professor:
That is correct! The medulla oblongata... Bobby Boucher:
But Mama said... Professor:
The medulla oblongata... is where anger, jealousy and aggression come from. Now, is there anybody here can tell me where happiness comes from? Anyone? All right, let's hear what Mama has to say on the subject. Bobby Boucher:
Mama say that happiness is from magic rays of sunshine that come down when you feelin' blue. Professor:
[Chuckling]
Well, folks, Mama's wrong again. Bobby Boucher:
No, Colonel Sanders, you're wrong. Mama's right. You're all wrong. Mama's right. Mama's right! Professor:
Somethin' wrong with his medulla oblongata