This isn’t really a strength thing. It’s survival of the fittest. At birth your son’s doctor would have rated him on what’s called the APGAR scale. This acronym is a way to measure your baby’s vitality hat birth and 10 minutes after. The “G” stands for grip. It’s a reflex called the “Darwinian reflex”. It’s present in all infant primates. It’s meant to be strong enough for an infant to hang from and in other, hairier primates it’s meant to let them hold to mothers fur should she need to swing through trees to be safe from a predator…
