Infant monkeys cling to their mothers 24x7. Until very recently the vast majority of humans slept in one room huts with the youngest child next to the mother. M

Infant monkeys cling to their mothers 24x7. Until very recently the vast majority of humans slept in one room huts with the youngest child next to the mother. My kids had their own beds, but slept with me until nine or ten until they decided to prefer their own beds.