or it just could be, as babies babble their first sounds tend to be ma, ma ma, , and da, da, da, (and ba, ba, ba,)

and words with theses sounds became associalted with parents, baby, breast.

eventually kids learn to actually say words, (and their first words are usually titles/names for caretakers, themselves, and food, and sources of pleasure, (unless they are unusual!)

my other obsession