Nurses aren't supposed to laugh, But as she was getting ready to examine Fred, a first time male patient, he stopped her and asked her not to laugh...
"Of course I won't laugh she said, I'm a professional nurse. In over twenty years I've never laughed at a patient."
"Okay then," Fred said and proceeded to drop his trousers, revealing the tiniest 'man thingy' the nurse had ever seen. Length and width, it couldn't have been bigger than a AAA battery. Unable to control herself, the nurse started giggling then fell laughing to the floor.
Ten minutes later she was able to struggle to her feet and regain her composure.
"I'm so sorry," said the nurse. "I don't know what came over me. On my honor as a nurse and a lady, I promise it won't happen again. Now, tell me, what seems to be the problem?"
"....It's swollen," Fred replied. ... Things went downhill from there!