Carcinoma of the penis is rare with a reported rate of 1 person in , in developed countries. In April , Kinshasa , Democratic Republic of Congo, West Africa's 'Police arrested 14 suspected victims of penis snatching and sorcerers accused of using black magic or witchcraft to steal make disappear or shrink men's penises to extort cash for cure, amid a wave of panic. Emergency medical assistance should be obtained as soon as possible. The condition has been associated with a variety of drugs including prostaglandin. It is usually the result of sexual stimulation , which may include prostate stimulation. This increase in the number of sperm a male produces in response to sperm competition is not observed for masturbatory ejaculates. Diabetes is a leading cause, as is natural aging. Despite atrophy of blood vessels and nerves, the arteries , veins , nerves and the corpora spongiosa were successfully matched.
It is fairly common and can follow a particularly vigorous sexual activity for men, and tends to go away if given rest and more gentle care, for example by use of lubricants. Males and females report greater semen displacement behaviours following allegations of infidelity. The causative mechanisms are poorly understood but involve complex neurological and vascular factors. It is considered a benign physical condition. A recently brain-dead man, aged 23, was selected for the transplant. Through increasing the amount he inseminates his partner following separation, a male increases his chances of paternal certainty. Human males live largely in monogamous societies like gorillas, and therefore testis size is smaller in comparison to primates in multi-male breeding systems, such as chimpanzees. Emergency medical assistance should be obtained as soon as possible. Infection with the herpes virus can occur after sexual contact with an infected carrier; this may lead to the development of herpes sores. A refractory period succeeds the ejaculation, and sexual stimulation precedes it. Erectile dysfunction is the inability to develop and maintain an erection sufficiently firm for satisfactory sexual performance. Semen displacement The shape of the human penis is thought to have evolved as a result of sperm competition. It does this by forcing the semen under the frenulum of the coronal ridge, causing it to collect behind the coronal ridge shaft. It tends not to share the common blue tint with a vein however. Firstly, by displacing a rival male's sperm , the risk of the rival sperm fertilising the egg is reduced, thus minimising the risk of sperm competition. These varied in height, body shape and flaccid penis size, with these aspects being examples of masculinity. A micropenis is a very small penis caused by developmental or congenital problems. Prompt medical attention lowers the likelihood of permanent penile curvature. Size The number of sperm in any given ejaculate varies from one ejaculate to another. This is the process whereby males unwittingly invest their resources into offspring of another male and, evolutionarily speaking, should be avoided at all costs  The most researched human penis adaptations are testis and penis size , ejaculate adjustment and semen displacement. The pudendal nerve can be damaged by narrow, hard bicycle seats and accidents. Rarely, it is due to prostatic disease. Potential complications include ischaemia , thrombosis , and impotence. Occasionally there is a total loss of sensation and orgasm. Some sources state that circumcision can protect against this disease, but this notion remains controversial among medical circles. A thrombosis can occur during periods of frequent and prolonged sexual activity, especially fellatio. In serious cases the condition may result in gangrene , which may result in amputation.
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