Testosterone is not the only hormone that can influence your button-pressing intentions. There’s oxytocin, acclaimed for having prosocial effects among mammals. Oxytocin enhances mother-infant bonding in mammals (and enhances human-dog bonding). The related hormone vasopressin makes males more paternal in the rare species where males help parent. These species also tend to form monogamous pair bonds; oxytocin and vasopressin strengthen the bond in females and males, respectively.
