The buttocks singular: Ass two gluteus maximus muscles stabilise the hip joint and are the largest muscles in the entire human body; responsible for propelling the entire body forward when running and walking, ensuring the proper functioning of the entire leg.
In many cultures, they play a role in sexual attraction. There are several connotations of buttocks in art, fashion, culture and humor, and the English language is replete with many popular synonyms that range from polite colloquialisms "posterior", "backside" or "bottom" to vulgar slang "arse," "ass," "bum," "butt," "booty," "prat".
In humans the buttocks are located between the lower back and the perineum. The buttocks are formed by the cheeks of the gluteal muscles or "glutes" the gluteus maximus muscle beautiful chinese blowjob the gluteus medius muscle superimposed by a layer of fat.
The superior aspect of the buttock ends at the iliac crestand the lower aspect is outlined by the horizontal gluteal crease.
Booty Butt Cheeks
The gluteus maximus has two insertion points: The masses of the gluteus maximus muscle are separated by an intermediate intergluteal cleft or "crack" in which the anus is situated. The buttocks allow primates to sit upright without needing to rest their weight on their feet as four-legged animals do. Females of certain species of baboon have red buttocks that booty to attract males.