Penis
Gopla Grove, Chinese Psycology Online, http://www.zgxl.org

penis

A man's reproductive and sex organ that is formed of spongy tissue and fills with blood during sexual excitement, a process known as erection. Urine and semen pass through the penis.

The penis, the male copulatory organ, is a cylindrical pendant organ located anterior to the scrotum and functions to transfer sperm to the vagina. The penis consists of three columns of erectile tissue that are wrapped in connective tissue and covered with skin. The two dorsal columns are the corpora cavernosa. The single, midline ventral column surrounds the urethra and is called the corpus spongiosum.

The penis has a root, body (shaft), and glans penis. The root of the penis attaches it to the pubic arch and the body is the visible, pendant portion. The corpus spongiosum expands at the distal end to form the glans penis. The urethra, which extends throughout the length of the corpus spongiosum, opens through the external urethral orifice at the tip of the glans penis. A loose fold of skin, called the prepuce, or foreskin, covers the glans penis.

Foreskin

FAQs about penis

What's the average size of the penis? What are the extremes?

According to the book Mandens Krop (which is translated from English, but does not give the original title) the average is 15cm and 90% are between 13 and 18cm.
The records for a fully functional penis are 1.5cm and 30cm.

Is penis size important?

This is probably one of the most frequently asked questions on alt.sex, and that's a shame, because it's really a pointless question. Penis size is important if and only if you think it is. If you have sex with men and you desire a large penis, then penis size is important to you, and only to you. If you feel your penis should be larger, then penis size is important to you, and only to you.
Many women report that too many men are hung up on the size of their penises. The vagina is only eight to thirteen centimeters long, and even a small penis can touch every square centimeter within the vagina.

Can penis size be increased?

Yes. There are two surgical procedures to increase penis size-- the Bihari Procedure, and Fat Injection.
The Bihari Procedure consists of cutting the ligament that secures the base of the penis to the body. This gives between one-half and two inches of increased length to the penis; however, because the penis is no longer anchored to the body an erection no longer points 'up.'
Fat Injection is the process of removing fat from the backs of the thighs and injecting it into the body of the penis to make the penis thicker. Because the body rejects a significant portion of the injection this procedure may need to be repeated several times and each operation carries with it a severe risk of infection.

How do I measure my penis?

According to Harold Reed, M.D., director of the Reed Centre for Ambulatory Urological Surgery in Bay Harbor, Florida, this is the correct way to measure the length of your penis:

First, while standing, get an erection. Okay, now gently angle your, er, equipment down until it is parallel to the floor. Set your ruler against your pubic bone just above the base of the penis, and measure to the tip. Thats how the doctors do it.

My penis bends down (or left, or right). Is there something wrong with it?

One-quarter of all penises bend in some direction and some bend downward even when erect. Unless the bend is severe or causes you pain, there is nothing wrong or abnormal about your penis. It should not interfere with sexual intercourse. Some people report that a downward-bending penis is easier to fellate.
In rare cases a condition called Peyrone's Syndrome can arise from childhood diseases. This condition is caused by scarring on one of the two corpora cavernosa within the penis, stunting its effectiveness during erection and causing the penis to bend almost 90 degrees in that direction. If you feel this may be the case, consult a urologist.

What is circumcision and why is it done?

Male circumcision is the surgical removal of the foreskin from the penis. When performed in a hospital, it is usually done shortly after birth by a doctor or midwife. Circumcisions are also given to Jewish boys by a mohel in a ceremony eight days after birth. Some Islamic boys are circumcised when they are older, around age 12. The majority of American boys are circumcised.
Common reasons for circumcision include: better hygiene, "normal" or "better" appearance, and "his penis should look like his father's." Common reasons against circumcision include: it is no longer necessary for hygienic reasons; it is a painful, barbaric practice; possibility of infection or surgical error; "normal" or "better" appearance; "his penis should look like his father's."; and "greater sensitivity of uncircumcised penis."

What are blue balls?

Blue Balls is a real condition! The "correct" term for blue balls is epididymitis, which is an inflammation of the epididymis.
In simple terms blue balls occurs when the epididymis get blocked up with sperm that have left the testis but not the penis. The vas deferns are the conduit for the sperm from the testis to the urethra. When they get blocked you get pain. Why blue balls and not "swollen balls," well maybe the connotation is that you balls have the "blues", or maybe its because with all that swelling some of the blood flow is restricted enough to cause some blueing of the area because of pooling blood.

Why is the prostate mentioned so often during discussions of anal sex?

The prostate is about the size of a walnut in a normal man, and is immediately behind the rectal wall about three centimeters inside the anus. It can be felt by placing one finger within the anus and feeling along the anterior wall for a round bulb. For some men, touching or rubbing this spot is extremely pleasurable; a rare few can even orgasm through this technique. Others report that the touch is painful or makes them feel as if they need to urinate.
The alt.sex FAQ on anal sex answers this question in more detail.

Penis: An Owner's Manual by Greg Dervin Chances are that either you or someone you know has a penis. Having a penis can be fun: it's hanging out, not hidden in the body; it's easy to play with; and even lets us pee standing up. But sometimes having a penis can be downright annoying. Let's take a look at some of the big issues concerning young men and their penises. Size: One of the biggest concerns for many teens (and many grownups too, for that matter) is the size of their penis. Many guys want to know, "Do I have a small penis?" Sometime during puberty, a boy's penis starts to get bigger. Just like all other aspects of puberty, there isn't a set age at which this happens, but rest assured it happens to everyone. There isn't a normal size for any particular age. However, 90 percent of all adult erect, or hard, penises are between five and seven inches long. Also, the size of a guy's penis when it's flaccid (soft) doesn't really have anything to do with what it will be like when it's erect. As they become erect, smaller flaccid penises tend to grow more than penises that are larger when they're flaccid. Erections: When a man gets aroused sexually, blood flows into his penis at a faster rate than it flows out (called vasocongestion). This causes the penis to get larger and harder, which is called getting an erection. Sometimes though, erections can happen at the weirdest times. For example, you're sitting in math class taking a test, and all of a sudden you've got a hard-on. Turned on by algebra? Not likely. What you have is a spontaneous erection. Spontaneous erections are erections that you get when you're not sexually aroused. Spontaneous erections seem to just pop up for no reason at all. And that can feel pretty embarrassing. They go away fairly quickly if you ignore them. You can sing a song in your head, or try to say the alphabet backward to get your mind off it. This can happen a lot to a teenager because your hormones are all over the place. Don't worry; spontaneous erections happen less and less frequently as you get older. They also seem to happen less frequently for men who have recently ejaculated by masturbation or by having sex with a partner. Circumcision: Are you cut or not? And most importantly, so what? Circumcision (or removal of the foreskin) is generally done shortly after birth. About 60 percent of boys in America are circumcised at birth (which means that 40 percent are not circumcised), making both cut and uncut penises almost equally common. They both work the same way; they just look a little different. But guys who have uncircumcised penises need to pull the foreskin back when they urinate, put on a condom, and wash themselves ¡ª whether uncircumcised or circumcised, proper cleaning of the glans and shaft of the penis is important. Wet Dreams: Ever wake up in the morning to find that you had come in your sleep? This is called a wet dream and it's completely normal. Sometime while you were sleeping, your penis got hard and you ejaculated. Most guys have wet dreams occasionally. As you get older and your hormones level off, you'll get them less and less. You'll also have wet dreams less often if you are ejaculating more while you are awake ¡ª the same as with spontaneous erections. Blueballs: It's talked about a lot, but what is it? "Blueballs" is a slang term for an uncomfortable or slightly achy feeling in the testes (balls). This can occur when a man gets an erection but doesn't ejaculate. Guys don't get blueballs every time they get an erection. Think of all those times you got an erection during class. It may have been a bit uncomfortable, but the discomfort went away as quickly as the erection. Masturbation: Most guys and girls masturbate. Masturbation is touching the genitals to receive pleasure. Why do people masturbate? Because it feels good! But guess what? It has some other great benefits, too. Masturbation is one of the best ways to learn about your body and what feels good sexually. This is not only enjoyable in and of itself; but it can also make it easier to show a partner how one likes to be touched. Best of all, masturbation is the safest sex: there are no worries of pregnancy or sexually transmitted infections. It won't cause blindness, make hair grow on the palms, cause insanity, or any other horrible myth you may have heard about it. But it will reduce stress. Most guys masturbate by wrapping their hand around the shaft of their penis, like a fist, and stroking it up and down. However, there are many ways of masturbating, and it can be done with or without a partner. Masturbation has had a bad rap for centuries. There was even a time when it was considered so evil that it was worse than rape! Happily, those days are long gone, and masturbation is considered normal and healthy for people who have penises and people who don't!