I don't expect offering children a preference is a particularly useful thing to do. In all except a tiny minority of cases (where the person has some form of me

I don't expect offering children a preference is a particularly useful thing to do. In all except a tiny minority of cases (where the person has some form of mental illness, or possibly genetic abnormalities) gender and sex are equivalent. The abnormal cases are generally going to become apparent through behaviour anyway, and can be dealt with then.