The roundest knight at King Arthur's round table was Sir Cumference. He acquired his size from eating too much pi.

A doctor walks into a room full of patients at a mental institution, takes out a pen, and draws a door on the wall. He then tells all the patients that whoever wants to escape, should use that door. Immediately they all rush towards it, but of course cannot go through. However, one patient sits still in the back with a smile on his face. He has not moved at all. The doctor thinks he must be cured. He then asks the patient why he did not rush to the door, and the patient whispers, "They don't know that I'm the one who has the key."

When someone yawns, do deaf people think they're screaming?

An old man goes to the doctor for some tests. When he gets the results, the doctor tells him that he has bad news. The old man says, "Just give it to me straight, doc." The doctor says, "Well, you have cancer, and you have Alzheimer's." The old man says, "I guess it could be worse. I could have cancer."

What is so great about being a test tube baby? You get a womb with a view.