I taught human A&P. My friend was a pathologist. I told him about the difficulty in finding good tissue for nursing students to look at without paying huge, prices beyond the budget of my judo. He offered to give me some organs and X-rays after he removed all identifying numbers and names. We were out in the parking lot fishing through pickle jars of hearts, intestines, kidneys, muscles, brains. It was grisly business. Humor is a tension reliever.