Homer: (Wearing glasses) The sum of the square roots of any two sides of an isosceles triangle is equal to the square root of the remaining side! Man: (From inside a bathroom stall.) That's a right triangle, you idiot! Homer: D'oh!
Homer: Marge, I want you to admit you have a gambling problem. Marge: You know, you're right, Homer. Maybe I should get some professional help. Homer: No, no, that's too expensive. Just don't do it anymore.