10th grade

the 10th grade teacher asks jessica: "what part of the human body increases 10 times it's normal size when excited?"

jessica responds: "That's disgusting! I don't have to answer that question!"

So the teacher asks little johnny, who responds: "that's easy... the pupil of the eye." "thats correct johhny. Very good!"

and turning to jessica she says: "i've got 3 things to say to you, young lady... first, you didn't do your homework; second, you have a dirty mind; and third you're in for a big disapointment!"