Kin-selection is sheer nonsense, based on the false assumption that the gene for helping is a rare gene, whose chance to be shared can only be provided by kinship. The gene for helping is instead universally shared within and across species with altricial young, invented to foster the survival of offspring. As begging and helping are complementary behaviors, both triggered by oxitocin ( mesotocin for lungfishes, amphibians, reptiles, and birds) begging is usually a reliable sign of the possession of the gene for helping. This is why helping is rewarding and allofeeding is widely diffused. Hence we can even see a sea gull feeding a penguin. It is not a mistake: it is the selfish gene for helping that recognizes itself in a gaping beak, not in an arbitrary tag as a green beard (Dawkins). If we have surplus of food and don't have offspring to feed, we too, as a sea gull, strive to bypass obstacles to energy flow, looking for someone else to feed, if not other humans, at least a pet.