It seems reasonable to expect that some behaviors transcend culture and go back to instinct (tho expectations often conflict with reality) which probably is not even human specific.
IIRC Konrad Lorenz pointed out in Solomon's Ring that rooks will exhibit "infantile behavior" when grooming in a mated couple which, well, humans do it when they cuddle too.
As an aside: my favorite italian gesture is "tasty" (put index on cheek and spin back and forth) which is only used by and for children. I'm on a lifelong mission to spread it everywhere.
IIRC Konrad Lorenz pointed out in Solomon's Ring that rooks will exhibit "infantile behavior" when grooming in a mated couple which, well, humans do it when they cuddle too.
As an aside: my favorite italian gesture is "tasty" (put index on cheek and spin back and forth) which is only used by and for children. I'm on a lifelong mission to spread it everywhere.