Next, the researchers took photographs of the macaques and loaded them into a computer program. Some females were photographed from behind, so that the image showed a close-up of their hindquarters. Other pictures were head shots of both males and females.
Four of the male monkeys then sat in front of computer screens. They were rewarded with juice whenever they shifted their gaze from one image to another. Some images resulted in more juice than other photos.
The findings are published in this week's issue of Current Biology.
When given the choice between a photo of a low-status male with a high juice reward and a photo of a female's hindquarters, the male test subjects refused the extra juice so that they could gaze at the sexy female images. They also "paid" with juice to see photos of high-status males.
So there you go ladies, we can't help it, it's programmed into our biology. Maybe with this in mind you'll give the monkey on your arm a little slack when his head turns a little too quickly.
They should also test if the monkeys prefer the ass uncovered, or in a nice pair of Seven jeans.
Who Needs Juice When You Got All This Juicy Ass To Look At [Discovery Channel]