A selection of penises from different species at the Icelandic Phallological Museum

The penis (plural penises, penes) is a biological feature of male animals including both vertebrates and invertebrates (creatures with and without backbones, respectively). It is a reproductive, intromittent organ that additionally serves as the urinal duct in placental mammals.

Etymology[link]

The word "penis" is taken from the Latin word for "tail." Some derive that from Indo-European *pesnis, and the Greek word πέος = "penis" from Indo-European *pesos. Prior to the adoption of the Latin word in English the penis was referred to as a "yard". The Oxford English Dictionary cites an example of the word yard used in this sense from 1379,^[1] and notes that in his Physical Dictionary of 1684, Steven Blankaart defined the word penis as "the Yard, made up of two nervous Bodies, the Channel, Nut, Skin, and Fore-skin, etc."^[2]

As with nearly any aspect of the body involved in sexual or excretory functions, the penis is the subject of many slang words and euphemisms for it, a particularly common and longstanding one being "cock".

The Latin word "phallus" (from Greek φαλλος) is sometimes used to describe the penis, although "phallus" originally was used to describe images, pictorial or carved, of the penis.^[3]

Pizzle, an archaic English word for penis, of Low German or Dutch origin, it is now used to denote the penis of a non human animal.

The adjectival form of the word penis is penile. This adjective is commonly used in describing various accessory structures of male copulatory organs found in many kinds of invertebrate animals.

There are dozens of slang words, euphemisms and synonyoms for the penis in English and in other languages. See WikiSaurus:penis for a list of alternative words for penis.

In different animals[link]

Vertebrates[link]

Mammals[link]

As with any other bodily attribute, the length and girth of the penis can be highly variable between individuals of the same species. In many animals, especially mammals, the size of a flaccid penis is smaller than its erect size.

A bone called the baculum or os penis is present in most mammals but absent in humans and horses.

Domesticated mammals[link]

In domestic animals the penis is divided into three parts:^[4]

• Roots (crura): these begin at the caudal border of the pelvic ischial arc.
• Body: the part of the penis extending from the roots.
• Glans: the free end of the penis.

The internal structures of the penis consist mainly of cavernous (erectile) tissue, which is a collection of blood sinusoids separated by sheets of connective tissue (trabeculae). Some animals have a lot of erectile tissue relative to connective tissue, for example horses. Because of this a horse's penis can enlarge more than a bull's penis. The urethra is on the ventral side of the body of the penis.

Stallions have a vascular penis. When non-erect, it is quite flaccid and contained within the prepuce (sheath). The retractor penis muscle is relatively underdeveloped. Erection and protrusion take place gradually, by the increasing tumescence of the erectile vascular tissue in the corpus cavernosum penis.^[5]

A bull has a fibro-elastic penis. There is a small amount of erectile tissue and a small amount of enlargement after erection. The penis is quite rigid when non-erect, and becomes even more rigid during erection. Protrusion is not affected much by erection, but more by relaxation of the retractor penis muscle and straightening out of the sigmoid flexure.^[5]

Canids, including dogs, have a bulbus glandis at the base of their penis. During coitus the bulbus glandis swells up and results in a 'tie' (the male and female dogs being tied together). Muscles in the vagina of the female assist the retention by contracting.

The bull, ram and boar have a sigmoid flexure of their penis. This results in an S-shaped penis. It is straightened out during erection.

Cats have barbed penis, with about 120–150 one millimeter long backwards-pointing spines^[6]. Upon withdrawal of the penis, the spines rake the walls of the female's vagina, which is a trigger for ovulation.

Other mammals[link]

As a general rule, an animal's penis is proportional to its body size, but this varies greatly between species – even between closely related species. For example, an adult gorilla's erect penis is about 4 cm (1.5 in) in length; an adult chimpanzee, significantly smaller (in body size) than a gorilla, has a penis size about double that of the gorilla. In comparison, the human penis is larger than that of any other primate, both in proportion to body size and in absolute terms.^[7]

In the realm of absolute size, the smallest vertebrate penis belongs to the Common Shrew (5 mm or 0.2 inches). Accurate measurements of the blue whale are difficult to take because the whale's erect length can only be observed during mating.^[8]

Most marsupials, except for the two largest species of kangaroos, have a bifurcated penis. That is, it separates into two columns, and so the penis has two ends corresponding to the females' two vaginas.^[9] Neither marsupials nor monotremes possess a baculum.

Echidnas have a four-headed penis, but only two of the heads are used during mating. The other two heads "shut down" and do not grow in size. The heads used are swapped each time the mammal has sex.^[10]

The shape of the human penis has been argued to have been selected by sperm competition. The shape is argued to help displace seminal fluids that were implanted within the female reproductive tract by a rival male. The thrusting action which occurs during sexual intercourse manually removes seminal fluid out of the cervix area from a previous mating.^[11]

Other vertebrates[link]

Most male birds (e.g., roosters and turkeys) have a cloaca (also present on the female), but not a penis. Among bird species with a penis are paleognathes (tinamous and ratites), Anatidae (ducks, geese and swans), and a very few other species (such as flamingoes). A bird penis is different in structure from mammal penises, being an erectile expansion of the cloacal wall and being erected by lymph, not blood. It is usually partially feathered and in some species features spines and brush-like filaments, and in flaccid state curls up inside the cloaca. The Argentine Blue-bill has the largest penis in relation to body size of all vertebrates; while usually about half the body size (20 cm), a specimen with a penis 42.5 cm long is documented.

Male turtles and crocodiles have a penis, while male specimens of the reptile order Squamata have two paired organs called hemipenes. Tuataras must use their cloacae for reproduction.^[12]

In some fishes, the gonopodium, andropodium, and claspers are intromittent organs (to introduce sperm into the female) developed from modified fins.

The spine-covered penis of Callosobruchus analis, a Bean weevil.

Invertebrates[link]

The record for the largest penis to body size ratio is held by the barnacle. The barnacle's penis can grow to up to forty times its own body length. This enables them to reach the nearest female.^[8]

In male insects, the structure analogous to a penis is known as aedeagus. The male copulatory organ of various lower invertebrate animals is often called the cirrus.

A number of invertebrate species have independently evolved the mating technique of traumatic insemination where the penis penetrates the female's abdomen and deposits sperm in the wound it produces. This has been most fully studied in bedbugs.

Cultural uses[link]

• Culinary, particularly in Chinese gastronomy (such as dishes from the Guo Li Zhuang Restaurant)
• Magical and therapeutic, in medicine and/or superstition, especially as an alleged aphrodisiac or supposed cure for impotence – for example the deer penis and tiger penis.
• Punitive implements, such as the bull pizzle made into a form of whip.
• Dog chew toys, such as the bull pizzle (cut into short lengths for this purpose).

See also[link]

References[link]

External links[link]

Look up penis in Wiktionary, the free dictionary.

Media related to Penis at Wikimedia Commons

• Kinsey Institute on the penis

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (April 2012)

"The Man" is a slang phrase that may refer to the government or to some other authority in a position of power. In addition to this derogatory connotation, it may also serve as a term of respect and praise.

The phrase "the Man is keeping me down" is commonly used to describe oppression. The phrase "stick it to the Man" encourages resistance to authority, and essentially means "fight back" or "resist", either openly or via sabotage.^[1]

History[link]

The earliest recorded use^{[citation needed]} of the term "the Man" in the American sense dates back to a letter written by a young Alexander Hamilton in September 1772, when he was 15. In a letter to his father James Hamilton, published in the Royal Dutch-American Gazette, he described the response of the Dutch governor of St. Croix to a hurricane that raked that island on August 31, 1772. "Our General has issued several very salutary and humane regulations and both in his publick and private measures, has shewn himself the Man." ^{[2][dubious – discuss]} In the Southern U.S. states, the phrase came to be applied to any man or any group in a position of authority, or to authority in the abstract. From about the 1950s the phrase was also an underworld code word for police, the warden of a prison or other law enforcement or penal authorities.

It was also used as a term for a drug dealer in the 1950s and 1960s and can be seen in such media as Curtis Mayfield's "No Thing On Me", William Burroughs's novel Naked Lunch, and in the Velvet Underground song "I'm Waiting for the Man", in which Lou Reed sings about going to Uptown Manhattan, specifically Lexington Avenue and 125th Street, to buy heroin.

The use of this term was expanded to counterculture groups and their battles against authority, such as the Yippies, which, according to a May 19, 1969 article in U.S. News and World Report, had the "avowed aim ... to destroy 'The Man', their term for the present system of government". The term eventually found its way into humorous usage, such as in a December 1979 motorcycle ad from the magazine Easyriders which featured the tagline, "California residents: Add 6% sales tax for The Man."

In present day, the phrase has been popularized in commercials and cinema, featuring particularly prominently as a recurring motif in the 2003 film School of Rock.^[3][4][5][6]

Use as praise[link]

The term has also been used as an approbation or form of praise. This may refer to the recipient's status as the leader or authority within a particular context, or it might be assumed to be a shortened form of a phrase like "He is the man (who is in charge)." One example of this usage dates to 1879 when Otto von Bismarck commented, referring to Benjamin Disraeli's pre-eminent position at the Congress of Berlin, "The old Jew, he is the man."^{[7][dubious – discuss]}

In more modern usage, it can be a superlative compliment ("you da man!") indicating that the subject is currently standing out amongst his peers even though they have no special designation or rank, such as a basketball player who is performing better than the other players on the court. It can also be used as a genuine compliment with an implied, slightly exaggerated or sarcastic tone, usually indicating that the person has indeed impressed the speaker but by doing something relatively trivial.

See also[link]

• Absentee landlord
• Big Brother (Nineteen Eighty-Four)
• New World Order (conspiracy theory)
• Ruling class
• The Establishment
• Power elite
• Corrections officer
• YTMND

Notes[link]

References[link]

• Lighter, J.E. (Ed.). (1997). Random House Dictionary of American Slang. New York: Random House.