Quirks and quarks is playing a segment on voles and oxycontin. They are thinking oxytocin does not guarantee social attachments. After genetically modifying the receptors to oxytocin, they found no difference in mating partners monogamy and offsprings raising. The babies are smaller as the mom has stunted milk production, but both parents took excellent care of offsprings even without oxytocin. The researcher thinks maybe a redundant pathway developmental, is in place.