Grooming

Study: Monkeys 'pay' for sex by grooming - Science- msnbc.co...


Japanese Macaque monkeys groom each other, sitting in a hot spring in the snow at Jigokudani Wild Monkey Park in Yamanouchi, Nagano prefecture, central Japan. Male macaque monkeys pay for sex by grooming females, according to a recent study that suggests the primates may treat sex as a commodity.

Apparently  Humans are not the only species that has to pay for Sex. Male Primates Pay for mating through the act of Grooming the female. However the Female Primate may not be this lucky all the time. This act is depending on the amount of Females in the vicinity, in which the Male has option to mate with. It is much like the College Campus in  which Males  have many more options to mate than when he is released into the general population of society.