A man went to the doctor and said 
Doctor I have a problem, but if you are going to treat it you must promise not to laugh.
Of course I won`t laugh, the doctor said, I`m a professional, in over 20 years I`ve never laughed at a patient.
O.K. then,the man said, and proceded to drop his trousers, revealing the tiniest **bleep** the doctor has ever seen, 
Unable to control himself, the doctor fell laughing to the floor. Ten minutes later he was able to struggle to his feet,and regain his composure.
I`m so sorry, he said, I dont know what came over me. On my honor as a doctor and a gentleman, I promise it won`t happen again,
O.K., the man says,
Now the doctor says, getting down to business, What seems to be the problem ?
Well, the guy says, ...its swollen...