You have proposed a mechanism. Now Occam's razor it! You have replaced a simple explanation for which abundant evidence exists with a complicated explanation.

You have proposed a mechanism. Now Occam's razor it! You have replaced a simple explanation for which abundant evidence exists with a complicated explanation. You could spend time inventing even more complications for your theory to explain things like why there aren't any cultures that have the opposite effect on female mathematical behaviour, and why very high mathematical ability seems to be linked to androgyny in females, or you could just junk the theory as unlikely. Unless you'd rather rather say something politically correct than true, that is. But nobody would chose opinions about the world like that, would they?