Sex Ratios, Prostitution and Monkey Sex

A fascinating new study coming out in Animal Behavior suggests that male monkeys pay for sex, specifically with services performed, and that as the sex ratio moves in favor of the males (ie, more females to males), the males spend less time grooming their partner. Less cuddling and no money spent on movie and a dinner? Interestingly, this is in its own way a paper I'm trying to get published. Maybe I should send it to Animal Behavior.