In some hospitals the baby is placed in skin - to - skin contact with the mother while she is still on the operating table. (breastfeeding.asn.au)
Later on, the puppy will perform the same twist movement in the absence of any physical contact with the mother or any other adult. (ethology.eu)
Apes mature faster than humans do, but they stay in constant contact with their mothers until they stop nursing - an average of three years. (boba.com)