As I knocked on the door of a patient's room I noticed she was on the commode. She yelled "I wouldn't come in here if I were you...I can't seem to have a bowel movement but I sure am passing a lot of gas" I assured her that eventually she would have results and asked her if she knew what a fart was. She looked confused and said "Well, no." to which I replied "It is a turd honking for the right of way" She laughed so hard that she almost fell off the commode. I can't remember where I heard that joke but use it on occasion to bring some humor into embarrassing situations.