Entitled: "Amateurs executant une courante" shows a group of musicians performing inside a public restroom, using clysters and chamber pots as musical instruments. Toilet humor is a type of off-color humor dealing with defecation, urination, and flatulence, and to a lesser extent vomiting and other body functions. Toilet humor is popular among a wide range of ages, but is especially popular with children and teenagers, for whom cultural taboos related to acknowledgement of waste excretion still have a degree of novelty. Examples can also be found in earlier literature, including The Canterbury Tales by Geoffrey Chaucer. Lithograph by Gottfried Engelmann, 19th century.