Femininity Wish Gem

The Gem would grant wishes but the price for such a wish was that any wish would be twisted to make guys into girls and girls into super feminine girls. How could a gem make such a judgement on what is or isn't feminine? It would work according to the expectations of the society that raised whoever wielded it. Billy headed back with the gem in hand, and thinking to himself about previous events in the day made a thoughtless little wish that would change everything...