OT:NYT:
Many monkeys are skilled stone handlers, using rocks to dig up roots, cut plants and crack open fruits and nuts. But researchers reported that some macaques appear to use stones to engage in “a form of self-directed, tool-assisted masturbation.”
Many monkeys are skilled stone handlers, using rocks to dig up roots, cut plants and crack open fruits and nuts. But researchers reported that some macaques appear to use stones to engage in “a form of self-directed, tool-assisted masturbation.”