Sex-mad monkeys have been mating with other species, creating an entirely new hybrid population of apes — and scientists are absolutely fine with it.

The primates from Tanzania’s Gombe National Park have been at it for hundreds or even thousands of years, according to a new study.

By peeping into the DNA from the feces of 144 guenon monkeys from the site, researchers found evidence of ongoing mating between two genetically distinct groups.

These apes are known for their striking features long thought to be signs of species-specific mating – some have bushy beards, others have brightly-colored tufts of hair and even more have big noses.

Read more at the New York Post.