Nickolay Vinokurov Nickolay Vinokurov Updated at 1: ET on Friday, Nov. For many people, bestiality is a bad joke, but for some it could be a matter of life or death, according to a new study finding that men who had sex with animals in their lifetimes were twice as likely to develop cancer of the penis as others. The study of men from rural Brazil found that 35 percent of study participants, who ranged from 18 to 80 years old and included both penile cancer patients and healthy men, reported having sex with animals SWA in their lifetimes.
A team of urologists from centers around Brazil co-authored the paper, which looked at risk factors for penile cancer in men who had visited 16 urology and oncology centers in 12 Brazilian cities.
In addition to SWA, three other risk factors for penile cancer were found: Men who had sex with animals also reported a higher incidence of sexually transmitted diseases. Of the penile cancer patients, 45 percent reported having sex with animals, compared with 32 percent of healthy men, who visited the medical centers for benign conditions, check-ups or cancer prevention.
Fifty-nine percent of men who had sex with animals did so for one to five years, while 21 percent continued the behavior, also known as zoophilia, for more than five years. The subjects reported a variety of frequencies for their sex acts, ranging from monthly to daily.
More than 30 percent of subjects practiced SWA in groups. Theorizing a causal role Sex with animals could be as ancient as sex itself. Penile cancer accounts for up to 10 percent of cancers in men in Asia, Africa and South America, although it is rare in the U. Micro-injuries to the penis are a well-recognized risk factor for the development of penile cancer.
Such physical trauma could explain how sex with animals causes the cancer. Perhaps animal tissues are less soft than ours, and non-human secretions would be toxic for us," he explained. Zequi theorizes that micro-lesions caused by this toxicity could facilitate the action of some yet unrecognized microorganism during contact between different mammalian species.
With animals, you're at higher risk for micro-trauma, like cuts and scratches. And then whatever pathogens are there, like bacteria and viruses, are more likely to cause a problem. He postulated that the lifestyle of men who have sex with animals could also be a factor. Are they engaging in higher infectious-risk anal intercourse with people?
Circumcision also seems to play an important role in the development of penile cancer in men who have sex with animals. In global populations where the foreskin is removed soon after birth, the rates of penile malignancies are near zero. Uncircumcised men may develop more micro-traumas during sex, according to one theory on why circumcision protects against cancer. Smegma is the white secretion composed of fatty acids that collects around the glans of the penis.
Excess smegma found in uncircumcised men with poor hygiene or phimosis has been associated with penile cancer, and could also help to explain the increased risk. Not just a rural problem The subjects recruited from the study all grew up in rural areas of Brazil. The researchers wrote that they chose this population to investigate because sex with animals is common in rural areas with high rates of penile cancer, and a connection seemed plausible.
In fact, Zequi said he was not surprised that 35 percent of participants had had sex with animals. Most of the subjects reported that they stopped having sex with animals when they began having sex with people. Discoverer of Dead Gay Duck Sex ] Men who have sex with animals in developing countries are usually poor and illiterate, with little or no access to hygiene, health care or the Internet, Zequi said. The opposite is true in developed countries such as the U.
A study published in in the Archives of Sexual behavior in examined the demographics of self-defined zoophiles in the U. An online survey revealed that 36 percent lived in large cities and 83 percent were either college graduates or had completed some college. Forty-five percent of the respondents worked in informatics or technology, and some of them earned high incomes.
Just give a few clicks on the search sites on the Internet and you'll come across numerous 'zoo' sites or virtual communities focused on bestiality, many of which are pornographic and sometimes with degrading images. The new study was published online Oct. This story has been updated to correct language used to describe the link between smegma and cancer; while a link has been found, it is not proven that one causes the other.