4 ms·

Testosterone?

• tim333 11y ago
  Surprisingly that might work - "Several animal studies have shown that hormonal manipulation can reverse sex-typed behavior. When researchers exposed female rhesus monkeys to male hormones prenatally, these females later displayed male-like levels of rough-and-tumble play." http://www.theatlantic.com/sexes/archive/2012/12/you-can-give-a-boy-a-doll-but-you-cant-make-him-play-with-it/265977/ http://www.theatlantic.com/sexes/archive/2012/12/you-can-giv...