Anatomy

This organ helps you to digest, to sit, and is an object of desire. The behind has many functions. But how does everything work exactly? We’ll introduce you to your ass, from the cheeks to the intestines and the sphincter.

Ass Cheeks and Gluteal Muscle

The more acceptable term for your ass cheeks or buns is buttocks. The dictionary defines this term as follows: “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, to protect the intergluteal cleft (Crena ani).”

The buttocks consist of a large part of fat which can be reduced by exercising. They are also the home of the powerful gluteus maximus muscle, as well as two smaller muscles that lie below it: the gluteus medius and the gluteus minimus.

If you ever complain about your ass being too big, you should know that the maximus is the biggest muscle in the human body. It is very important for walking upright as it stretches the hip joint and allows the body to get out of its bent position. If this muscle is paralyzed, it is still possible to stand up and walk slowly but you will no longer be able to do complex movements, such as climbing stairs. Maximus helps to keep the balance. It is most active when we stand up. Like other muscles, you can, of course, exercise to make it sexy and tasty. More about this in the chapter FITNESS.

Taint

The taint (or perineum) is the area between the scrotum and the hole (the anus). This region consists mainly of extremely sensitive nerves. For men, it’s an erogenous zone (sometimes called the Highway to Heaven). With the prostate, the taint is considered to be the male G-Spot. The nerves that end here influence the erection as well as the shooting of one’s load.

Pressing onto this area could lead to a very strong reflex which can’t be controlled: This anal reflex lets the penis grow. Because this area is extremely sensitive, it could hurt when there is too much pressure on it—for example, when you are horseback riding or cycling.

The Hole

Doctors don’t use the term asshole, but refer to it as the anus (Latin: circular opening). It lies between the two cheeks and is the exit point of the intestines that releases waste. The sphincter makes sure that the intestines stay closed to the outside world. However, every gay person knows that you can stick stuff into your hole and that you will fucking like it!

These entries make you happy because the anal area in men—as well as in women—has many nerve endings. But this is only part of the fun: the sexually sensitive prostate adds to the pleasure.

There is, however, one disadvantage for butt sex: in contrast to vaginal sex, you have to use lube. Reason: the bulbourethral gland (Cowper’s gland) produces only small amounts of fluid—at least in the anus, since this gland is primarily responsible for producing the clear, salty secretion known as pre-ejaculate.

Sphincter

The sphincter is a rather funny solution to seal the hole. By contracting, it makes the hole smaller and smaller, until nothing goes in or out. This is quite common in nature: For example, shells make sure nobody gets inside the same way. In humans, this is also how our stomach exit is sealed.

The most well-known sphincter is in the ass. We are generally able to control it from kindergarten age. Like any similar muscles, we are able to relax it, which is a blessing during anal sex. It can be exercised as well—for example, with butt plugs. However, overstretching this muscle could be dangerous as it can cause small wounds that take a long time to heal.

Intestine

Intestines are not a popular topic for dinner talks. That’s why few people know that the intestine is the biggest organ in the human body: It measures a surface area between 1,500 and 4,000 square feet, which makes it larger than most houses or apartments. Compare this to the heaviest organ in the human body, the skin: This outer covering weighs up to twenty pounds, but measures only fifteen to twenty square feet. The huge surface of the intestine is necessary as it’s needed to digest up to four pounds of food each day. It is the most important part of the human digestive system.

To sum it up: After arriving in the stomach, food travels into the small intestine (which consists of the duodenum, jejunum, and ileum). It then moves down to the large intestine (which consists of the cecum and colon). Afterwards, the food—or rather, the indigestible parts of it—wanders down into the anal canal. From there it leaves the body.

The small intestine is about twenty feet long while the large intestine has a length of about four feet. Most of the digestive process takes place in the small intestine. It absorbs carbohydrates, proteins, fats, vitamins, salts, and water, which are then delivered to all parts of the body. Every single day, about nine liters of water go through the intestine. However, we only drink about two liters of water per day. The remainder is delivered by our glands, which recycle liquids constantly. The small intestine begins with the sphincter muscle at the end of the stomach. From the outside, the small intestine looks shriveled. It contains many wrinkles to get the most highly specialized cells in the smallest amount of space.

When leaving the small intestine, all the nutrients have been removed from the food mass, which is then taken over by the large intestine. In contrast to its smaller brother, the large intestine is smooth and not wrinkled. Its main job is to make the feces ready to be released. It’s like a ship dumping waste into the ocean, the only difference being that it does not dump the waste into the sea but (ideally) into the toilet bowl. The large intestine produces mucus to help the excrement make it out into the air.

During anal sex, there is a danger of injuring the final part of the large intestine. There could be anal fissures, which are cracks in the mucous membrane of the anus. This creates pain during the evacuation of the bowels. You can see blood in the stool or when wiping the ass with toilet paper. Usually, these injuries heal by themselves, but they could become chronic. Scientists are still not certain what the reasons for these fissures are. Some argue that other influences, especially high alcohol consumption, could increase the risks of injuries.

Prostate

In spite of equal rights, only human men and male mammals have prostates. This Greek word literally means “the one who stands before” or the “guardian,” and this body part produces part of the sperm. But gay men worship the prostate as the male G-Spot. It makes anal sex much more fun!

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The secretion of the prostate gives semen its color and smell. The fluid is slightly acidic (pH value: 6.4) and it contains numerous enzymes which are needed for impregnation. Furthermore, this cocktail contains phosphatase, citric acid, cholesterol, and zinc. This process is controlled—and this is no big surprise here—by the male hormone testosterone.

Unfortunately, the prostate is a very sensitive gland and chronic diseases are quite common. The most common occurrence is the benign prostatic enlargement, which especially hits older men. The growing gland causes trouble when peeing and can even lead to men not being able to pass water at all (urinary stasis). If untreated, this could be life-threatening. Fortunately, a couple of prescription pills can solve this problem. Malignant tumors are also a big danger, especially for men over the age of 50. With more than 200,000 cases diagnosed each year, it is the second leading cause of cancer-related deaths in men in the United States.