Bristolangela
Female
Perhaps petticoat punishment applied to white boys as a subject in school. Would feminize them to the point of little risk of their impregnating white women. Or at least reduce the chances.
Definitely feel more could be done at school at a time where white boys are most easily influenced. Often Petticoat punishment or some other public display of feminisation rules imposed by female teachers ( who their often obsessed with) could have a double influencing factor on both white males and pubescent females drawing the girls to black alpha males at an early age. Boys need to be taught also by their teachers it’s ok to serve and be girlie.