Male coercion and the costs of promiscuous mating for female chimpanzees (New article in Proceedings of the Royal Society B)

The link may not be accessible to you, so here is a bit of the summary:

sexual coercion is the probable primary function of male aggression against females. Specifically, we show that male aggression is targeted towards the most fecund females, is associated with high male mating success and is costly for the victims.

Very humane behaviour. Beat her before making love.

Wolfgang