Through a report on the BBC website I came across this article about female Capuchin monkeys throwing rocks at males to get their attention in order to mate. It’s quite an interesting article and touches on the other forms of tool use that the monkeys use.
I don’t think I would start throwing rocks at men though!
Falótico T, Ottoni EB (2013) Stone Throwing as a Sexual Display in Wild Female Bearded Capuchin Monkeys, Sapajus libidinosus. PLoS ONE 8(11): e79535. doi:10.1371/journal.pone.0079535