Ed

“Don't laugh!” said the patient, Ed. 

“Of course I won't laugh,” the doctor said. “I'm a professional. In over twenty years I've never laughed at a patient.” 

“Okay then,” Ed said, and proceeded to drop his trousers, revealing the tiniest 'hoo-ha' the doctor had ever seen. It could not have been bigger than the size of an AAA battery. 

Unable to control himself, the doctor started giggling, and then fell laughing to the floor. 

Ten minutes later, he was able to struggle to his feet and regain his composure. “I'm so sorry,” said the doctor. “I really am. I do not know what came over me. On my honor as a doctor and a gentleman, I promise it will not happen again. Now what seems to be the problem?”

“It's swollen,” Ed replied.