Babies crawl around in filthy environments, yet their immune systems are not fully developed. When a mother kisses her baby, she gets a sample of whatever dirt is on the baby's skin. Her immune system analyzes it for pathogens, and the next day she produces breast milk specially tailored to kill whatever the baby was crawling around the day before. WHY MOTHERS KISS THEIR BABIES
Babies crawl around in filthy environments, yet their immune systems are not fully developed. When a mother kisses her baby, she gets a sample of whatever dirt is on the baby's skin. Her immune system analyzes it for pathogens, and the next day she produces breast milk specially tailored to kill whatever the baby was crawling around the day before.
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