Ass or  buttocks (singular: buttock) are rounded portions of the anatomy located on the posterior of the pelvic region of the apes, including humans and many other bipeds or quadrupeds.

Because many cultures have a (partial) nudity taboo, which usually applies specifically to the buttocks (as usually to the most erogenous zones), mainstream garments generally cover the buttocks completely, even when it is not a practical requirement. Nevertheless male and female clothing is often designed in a way that reveals the shape of the buttocks under the clothing.

Some articles of clothing are designed to expose the buttocks. Such clothing is not generally worn in public situations; however, it is considered appropriate to wear such clothing at swimming facilities or at the beach.

My favourite ass AJ blogs:

1. **Assomatic's Bubble Booty**
2. The Shape of Things
3. In Your Face Booty

Spandex or elastane is a synthetic fiber known for its exceptional elasticity. It is stronger and more durable than rubber, its major non-synthetic competitor. It was invented in 1959 by DuPont chemist Joseph Shivers. When first introduced it revolutionized many areas of the clothing industry.

"Spandex" is a generic name and not derived from the chemical name of the fiber, which most manufactured fibers are, but an anagram of the word expands. "Spandex" is the preferred name in North America; elsewhere it is referred to as "elastane".

In comic books, superheroes and superheroines commonly wear costumes thought to be made of spandex. However, early superhero comics predate the invention of spandex (Superman-1938, Batman-1939, Captain America-1941). Printing processes for early color comics only rendered images with distinctly separate solid blocks of color well. Overprinting and color mixing yielded inconsistent results and bad looking muddy colors.

See also:

• Pantyhose