One reason for a mother’s impulse to kiss her newborn baby: the mother ingests the bacteria/viruses on baby’s skin, then her immune cells create antibodies that go into her breast milk, thus protecting the baby from imminent infection.
fact
One reason for a mother’s impulse to kiss her newborn baby: the mother ingests the bacteria/viruses on baby’s skin, then her immune cells create antibodies that go into her breast milk, thus protecting the baby from imminent infection.