When I went in for my last hernia op the surgeon - a young lady - came to the ward the day before to examine me. "Which side is it on?", she asked me. I pointed and she got out a marker pen and put a big circle on me at the appropriate position.
My wife came in that evening to visit me before the operation and I telephoned her in advance and asked her to bring in a similar marker pen. When she arrived I took the pen and drew a large arrow pointing towards my p. - well, man's part - and wrote "Please do not remove".
After my operation the lady surgeon came to visit me and told me that I had delayed the afternoon's operations because, when they removed my gown in the operating theatre, they couldn't stop laughing for several minutes and didn't dare start in case they broke out in laughter again.
Tim