Just think about this: The same people who harangued us for decades about the sin of reinforcing “gender norms” by giving girls Barbie dolls and boys toy guns are now insisting that it’s imperative that we give Barbie dolls to a three-year-old boy who wants to dress up like his older sister (as my emphatically masculine son did) or that we give toy guns to a little girl who chases after her girl brother and his friends when they play “war.” If we treat children as individuals, rather than stereotypes, they’ll almost invariably revert to their biological norms once they hit puberty. They may end up gay or lesbian, but they’ll know what’s in their underpants.
Source: In the face of transgender attacks on societal norms, note the missing science – Bookworm Room