"Of course I won't laugh" said the nurse, "I'm a professional with 20 years experience& I've never laughted at a patient."
Fred dropped his trousers to reveal ther smallest willie she had ever seen, length & width to match a AAA battery!
For 10 minutes the nurse rolled around on the floor in peals of laughter & finally, composing herself, apologised, said it wouldn't happen again.
"Now what seems to be the problem?" she asked.
Fred replied "It's swollen."
