A man goes to the doctors and says, Doctor, Ive got this problem you see, only youve got to promise not to laugh.

The doctor replies, Of course I wont laugh, that would be thoroughly unprofessional. In over twenty years of being a doctor Ive never laughed at a patient.

OK then, says the man, and he drops his trousers. The doctor is greeted by the sight of the tiniest penis he has ever seen in his life. Unable to control himself, he falls about laughing on the floor.

Ten minutes later he is able to struggle up to his feet and wipe the tears from his eyes, Im so sorry, he says to the patient, I dont know what came over me, I wont let it happen again. Now what seems to be the problem?

The man looks up at the doctor sadly and says, Its swollen.