I'm interested in bending latanoprost dosage for dogs mad thrilling This may be an uncomfortable thought, but researchers suggest that male infanticide may have put pressure on our ancestors to stay in long-term couples. There is evidence that Australopithecines and early modern humans displayed monogamous behavior. In humans in particular, researchers have proposed that the transition to social monogamy depended on females choosing to stay faithful to males — and that may be because they wanted to protect their children.