Certainly female nudity has the power to distract the heterosexual male, but does it have the power to calm him and make him less aggressive?
Context is key of course. A 1995 meta-analysis of the effects of pornography viewing on aggression found that media depictions of both non-violent and violent sexual activity boosted aggression in test subject -- more so in the case of violent material.
Yet the same study found that non-sexual, pictorial nudity actually reduced subsequent aggressive behavior. Meanwhile, a 2000 study published in Law and Human Behavior also found that heterosexual men become less aggressive subsequent to seeing images of nude women.