monkeys pay for sex by grooming

Found a funny article talking about how one researcher believes that monkeys pay for sex by grooming female monkeys. I can’t believe that this researcher considers grooming payment. I could see if there was some kind of exchange of material good for sex, like maybe if a monkey brought bananas and then got laid, but I agree with this newsvine commenter who says that if you consider giving attention as payment for sexual relations, then everyone in world is paying for sex.

macaque monkeys

I believe it is a bad tag line for this story and the associated research, and I myself do not consider grooming someone as payment.