Jealous Revenge

A Blonde suspects her boyfriend of cheating on her, so She goes out and buys a gun. She goes to his apartment unexpectedly and sure enough, she opens the door and finds him in the arms of a redhead. Well, the blonde is angry.  She opens her purse to take out the gun, but as she does so, she is overcome with grief. She takes the gun and puts it to her head. The boyfriend yells "No, honey, don't do it." The blond replies "Shut up, you're next."

Proof Points

Two Math Professors Are Sitting In A Pub. "Isn't it disgusting," the first one complains, "How little the general public knows about mathematics? "Well," his colleague replies, "You're perhaps a bit too pessimistic." "I don't think so," the first one replies. "And anyhow, I have to go to the bathroom."
He goes off and the other professor decides to use this opportunity to play a prank on his colleague. He calls over the pretty blonde waitress. "When my friend comes back, I'll wave you over to our table and I'll ask you a question. I would like you to answer, 'x to the third over three', can you do that?"
"Sure." The girl giggles and repeats several times. "x to the third over three, x to the third over three, x to the third over three..."
When the first professor comes back from the washroom, his colleague says, "I still think you're way too pessimistic. I'm sure the waitress knows a lot more about mathematics than you give her credit for."
He gets her attention and motions of her to come to their table.  He then asks her, "Can you tell us what the integral of x squared is?" She replies: "x to the third over three."
The other professor's mouth drops wide open, and his colleague grins smugly when the waitress adds: "Plus C"

Hair Up

Q: Why do blondes wear their hair up?
A: To catch everything that goes over their heads.