It s not so magical being a girl
Magic arises from the union of the animus and the anima. Every person has a male spirit, the animus, and a female spirit, the anima. In men, the female spirit is hidden away and the male spirit dominates, in females, the reverse is true, but the person who unifies both of their spirits becomes a magical girl! Once you have achieved this union, you may find there are some surprising changes to your body. -excerpt from So, You're A Magical Girl, Now What? "Don't care about that monster...