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Bear penis insert

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For example, the penis of a mammal is at most analogous to the penis of a male insect or barnacle. The term penis applies to many intromittent organsbut not to all; for example the intromittent organ of most cephalopoda is the hectocotylusa specialised arm, and male spiders use their pedipalps. Even within the Vertebrata there are morphological variants with specific terminology, such as hemipenes. In most species of animals in which there is an organ that might reasonably be described as a penis, it has no major function other than intromission, or at least conveying the sperm to the female, but in the placental mammals the penis bears the distal part of the urethrawhich discharges both urine during urination and semen during copulation.

Most male birds e. Among bird species with a penis are paleognathes tinamous and ratites [3] and Anatidae Bear penis insert, geese and swans. While most male birds have no external genitalia, male waterfowl Anatidae have a phallus. Most birds mate with the males balancing on top of the females and touching cloacas in a "cloacal kiss"; this makes forceful insemination very difficult.

The phallus that male waterfowl have evolved everts out Bear penis insert their bodies in a clockwise coil and aids in inseminating females without their cooperation.

These structures make it harder for males to achieve intromission. The clockwise coils are significant because the male phallus everts out of their body in a counter-clockwise spiral; therefore, Bear penis insert clockwise vaginal structure would impede forceful copulation.

Studies have shown that the longer a male's phallus is, the more elaborate the vaginal structures were. The lake duck is notable for possessing, in relation to body length, Bear penis insert longest penis of all vertebrates Bear penis insert the penis, which is typically coiled up in flaccid state, can reach about the same length as the animal himself when fully erect, but is more commonly about half the bird's length.

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Male and female emus are similar in appearance, [9] although the male's penis can become visible when it defecates. Bear penis insert male tinamou has a corkscrew shaped penis, similar to those of the ratites and to the hemipenis of some reptiles. Females have a small phallic organ in the cloaca which becomes larger during the breeding season.

As with any other bodily attribute, the length and girth of the penis can be highly variable between mammals of different species.

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A bone called the baculum or os penis is present in most mammals but absent in humans, cattle and Bear penis insert. In mammals the penis is divided into three parts: The internal structures of the penis consist mainly of cavernous, erectile tissuewhich Bear penis insert a collection of blood sinusoids separated by sheets of connective tissue trabeculae.

Some mammals have a lot of erectile Bear penis insert 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 Bear penis insert side of the body of the penis. In comparison, the human penis is larger than that of any other primateboth in proportion to body size and in absolute terms.

The penises of even-toed ungulates are curved in an S-shape when not erect. When mating, the tip of a male pronghorn 's penis is often the first part to touch the female pronghorn. Bulls have a fibro-elastic penis.

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Given the small amount of erectile tissue, there is little enlargement after erection. The penis is quite rigid when Bear penis insert, 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 of the sigmoid flexure.

The male genitalia of mouse deer are similar to those of pigs. The purpose of this is not fully understood. A stag's penis forms an S-shaped curve when it is not erect, and is retracted into its sheath by the retractor penis muscle.

Cetaceans' reproductive organs are located inside the body.

Male Bear penis insert whales, dolphins, and porpoises have two slits, the genital groove concealing the penis and one further behind for the anus. The penis on a right whale can be up to 2. Stallions have a vascular penis. When non-erect, it is quite flaccid and contained within the prepuce foreskin, or sheath. Tapirs have exceptionally long penises relative to their body size.

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All members of Carnivora except hyenas have a baculum. During copulation, the spotted hyena inserts his penis through the female's pseudo-penis instead of directly through the vaginawhich is blocked by the false scrotum and testes.

Once the female Bear penis insert her clitoris, the male enters the female by sliding beneath her, an operation facilitated by the penis's upward angle.


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