Soybeans couldn’t care less about human sex characteristics—genistein and daidzein may have evolved to act as chemical defenses against fungi and grazing animals. (They aren't very effective deterrents, apparently, since soy meal is widely used to feed livestock.)

But when humans consume these compounds in high enough quantities, they may experience gender-bending nightmares like James Price’s. https://www.menshealth.com/nutrition/a19539170/soys-negative-effects/