Mental Floss

WEIRD

deberarr/iStock via Getty Images (Background); kata716/iStock via Getty Images (Monkey). Photo collage courtesy of Ken Ossea, Jr.

Kids thought they were buying an adorable little pet when they ordered a monkey from their favorite comic book. What they got was a wild animal that pooped everywhere and attacked their mothers' bridge clubs.

Jake Rossen
Surprise! A leopard slug's penis is located on its head.

The animal kingdom features a wide variety of penises that vary in shape, size, and function. Here are some of the most unusual of them.

Ross Benes