The buttocks are two rounded portions of the anatomy, located on the posterior of the pelvic region of apes and humans, and many other bipeds or quadrupeds, and comprise a layer of fat superimposed on the gluteus maximus and gluteus medius muscles. Physiologically, the buttocks enable weight to be taken off the feet while sitting. In many cultures they play a role in sexual attraction. Many cultures have also used them as a safe target for corporal punishment. There are several connotations of buttocks in art, fashion, culture and humor, and the English language is replete with many popular synonyms.