I've heard similiar stories being
born in the West Indies (don't drink the red peas soup) wheteher or not it carries any weight is anyones
Some people especially the older generation might give some validity to the theory but you must consider
that that part of the world draws alot on superstion in Jamaica it's called O-bee-ya our word for black magic.
did recall reading here about women dabbing menstural fluid behind the ear as a form of attracting men.
guess is the whole thing is hogwash, based on superstition rather than actual fact.