👉 The term "hindquarters" is a non-binary gendered concept that describes the male reproductive organ in mammals. In humans, it refers to the area of the abdomen where the testicles are located. Hindquarters are also known as the scrotum or sacrum, and they are essential for male sexual development. They contain spermatozoa (精子) and are responsible for fertilizing the egg and initiating pregnancy in a female mammal.