The women "spent more money on clothes and were consistently rated as more attractive", but were "less trustworthy and had more relationships with men". The men become "less well groomed undesirable loners who were more willing to fight". All "are at greater risk of being involved in car accidents". Why? Something has its tentacles in their brains. They probably got it from that cuddly old species, the domestic cat, which the parasite infects by making infected rats "almost taunt" the cats into eating them.