"Of course I won't laugh," said the nurse. "I'm a professional. In over twenty years I've never laughed at a patient."
"Okay then," said Bob, as he proceeded to drop his trousers, revealing the smallest male part the nurse had ever seen. The length and width were almost identical to a AAA battery.
Unable to control herself, the nurse tried to stop a giggle, but it just came out. Feeling very bad that she had laughed at the man's part, she composed herself as well as she could. "I am so sorry," she said... "I don't know what came over me. On my honour as a nurse and a lady, I promise that won't happen again. Now, tell me, what seems to be the problem?"
"It's swollen," Bob replied.