The deer get something out of the deal as well, though it doesn’t seem to be quite as sensuous. “Not surprisingly,” the authors write in the study, “adolescent female macaques spent the vast majority of their consortship time in contact with the deer’s body parts offering the most stable contact zone (i.e., back and rump,and to a lesser extent, shoulder, neck and head).” While doing so, the researchers note, the macaques would perform grooming behaviors on their paramours; picking ticks and other skin parasites off of their backs and necks. “They groom areas not easily accessed by deer,” says Gunst-Leca. But while the monkeys sometimes playfully ride the deer “rodeo-style,” Gunst-Leca says, the new mounting behavior is definitely sexual. “The females mount the deer and thrust their pelvis,” she says.