Headaches

One day a man starts having terrible headaches. Everywhere he goes his head hurts, so he decides to go to the doctor to figure out the problem.

The doctor does a routine exam and can't figure out the source, so they decide to do a CAT scan and MRI. After the procedures, the doctor finds the route of the headaches seem to stem, for some reason, from his penis.

The doctor tries a few alternative procedures, to try and relieve the pain from the headaches, but they never go away. He then claims that the only way that he is sure the headaches would go away is if the man had his penis removed.

The man thinks it over very carefully, but being middle aged with no wife, and having used it quite extensively up to this point, he just absolutely cannot live with the headaches, so he decides to go through with the procedure and has his penis removed. The headaches stop immediately.

A few day later the man needs to buy a new suit for a party he is going to, so he goes to the store and sees the tailor. The tailor takes all of the usual measurements, then asks what side the man's penis hangs on. The man asks if it matters, to which the tailor replies, "Oh yes, sir, if it hangs on the wrong side you get these massive headaches."