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Physiologically, the buttocks enable weight to be taken off the feet while sitting. In many cultures, Butt ass 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 masses of the gluteal muscles or Butt ass the gluteus maximus muscle and 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. The gluteus maximus has two insertion points: The masses Butt ass 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 blush to attract males. In the case of humans, females tend to have proportionally wider and thicker buttocks due to higher subcutaneous fat and proportionally wider hips.

In humans they also have Butt ass role in propelling the body in a forward motion and aiding bowel movement. Some baboons and all gibbonsthough otherwise fur -covered, have characteristic naked callosities on their buttocks. While human children generally have smooth buttocks, mature males and females have varying degrees of hair growth, as on other parts Butt ass their body.


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