Visiting a clinic one day, Joe looked into the nurses eyes and said, "Nurses aren't supposed to laugh, right?"

"Of course I won't laugh. I'm a professional nurse. In over twenty years I've never laughed at a patient."

"Okay then," Joe said, and proceeded to drop his trousers, revealing the tiniest man penis 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 almost fell to the floor laughing.

A few minutes later she was able to 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," Joe replied.

Things went downhill from there.