One perhaps unintentional detail which makes that story realistic is that humans are the only species which processes sex and violence with the same part of the

One perhaps unintentional detail which makes that story realistic is that humans are the only species which processes sex and violence with the same part of the brain. In other words we are the only species prone to confuse sex and violence. It is one of just two sexual behaviors which are unique to humans (the other being we strongly prefer to do it in private).