Boffins spot a randy monkey trying to have sex with two DEER – and produce a 2,000-word study on it
Experts carry out in-depth investigation exploring why one pervy primate decided to hump animals from another species
A PERVY monkey has been spotted trying to have SEX with two deer and researchers were so moved by the experience they published an in-depth study exploring why he did it.
Scientists captured images of the macaque "mounting" female sika deer on Yakushima Island, Japan, which was enough to prompt them to write a peer-reviewed paper in a
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The amorous animal leaped onto the backs of two separate deer and tried to copulate with them.
However, he did not manage to penetrate the unfortunate females, instead grinding against their backs.
One deer tolerated his humping until he reached orgasm, before their encounter ended with an unprintable act which would make a porn star blush.
The second deer "did not accept the sexual behaviour", scientists reported, and "attempted to escape/remove the macaque by moving, increasing her speed, turning around and displaying threats".
The ape was also spotted showing possessiveness known as "mate-guarding behaviour", chasing away other male monkeys when they tried to approach the deer.
Astonished researchers collected their observations into a paper for the journal Primates, which they claimed was only the "second article describing a case of sexual interaction between distant species, and the first paper describing mating behaviour between a male Japanese macaque".
They wrote: "Only one scientific study describes this phenomenon, reporting sexual harassment of king penguins by an Antarctic fur seal.
"At the end of the mating behaviour, some penguins were killed and eaten."
The researchers suggested their work could help us to understand why humans engage in zoophilia, which is more commonly referred to as bestiality.
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They added: "Sexual interaction between distant species is rarely observed, and this is the second report of such a case.
"Whatever the reason for this particular event, the observation of highly unusual animal behaviour could be a key element in understanding the evolution of interspecific mating behaviour in the animal kingdom, and specifically in understanding zoophilia in humans."
The researchers cannot fully explain why the macaque tried to have sex with two deer, although they suggested it may have been "a means to learn how to copulate".
Normally, macaques learn the birds and the bees by watching other members of the same species having sex.
The pervy primate may also be sex starved and have "limited access to females".
But after being seen behaving like that, is it any wonder he can't get a girlfriend?
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