I'm certain this has gone on since the beginning of humans......
After many years completing our children, and now grandchildren reaching 10years old plus. We are surprised with a new (potential) grand-daughter, paternity test pending......
Glad to assist, but something I forgot about years ago - Daddy (Gr'pa) can never quite calm down a baby like a momma (or Gr'ma)
There must be a gene or something in the baby to accept a mother's touch rather than a man's? Motherly instinct over the male??
I'm no forensic anthropologist, but I still see something!!!!
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The most exciting phrase to hear in science, the one that heralds new discoveries, is not "Eureka" but rather "Hmmmmm...that's funny" - Isaac Asimov 1920-1992