It’s a strange breed of love.

Two species of completely different animals — a monkey and a deer — were recorded having “consensual” sex for the first time ever, according to a report released Tuesday.

In the rare case of inter-species lovin,’ a Japanese snow monkey and female sika deer were filmed doing the wild thing on Japan’s Yakushima Island.

The bizarre friskiness is likely due to “mate deprivation” and sheds some light on bestiality, according to the report, titled “Interspecies sexual behaviour between a male Japanese macaque and female sika deer.”

The footage shows the snow monkey, also known as a macaque, hop on the backs of two female sika deer and try to mount them. One of the deer rejects him — and the other goes for it.

The forbidden love is likely the first recorded case of “reproductive interference” between two very different types of animals — a primate and a cervidae, The UK Independent reported.

Only one other scientific study on the phenomenon of inter-species sex has ever been published.

Two years ago, scientists recorded an antarctic fur seal having sex with a king penguin. But their hookup was nonconsensual and scientists said the seal had harassed the penguin by not taking no for an answer.

The new study notes the deer, which was much larger than the monkey, “seemed to accept to be ridden by the male macaque.”