In the hidden world of magic, new students learn that magic requires the mastery of both passive and active energies. Being that the students are plucked out of cultures that tend to define sexual roles as either passive or active, it's usually the reversal of roles that is used to help enlighten potential witches-to-be.

    So, in magic school, the first year starts with a sort of prom. At first the freshman are directed to find a partner and take the traditional roles. Once that is over, more or less in order to get them warmed up, couples have their minds switched and are told to try and dance the other's role.

    The students are then told the reason why: it was important to understand that magic consisted of the passive and active energies, and that most spells required various amounts of both. Magic was equated to that of the wheel, in that there was a force to set them into motion and another force to direct said motion.

    Dancing was considered a good way to get the message across because of the passive and active roles involved. Of course, while the students tended to learn the lesson, they usually never managed to dance adequately. Not only did they have new bodies to control, but they had to control their bodies contrary to what they were accustomed to. The girl would try to lead, not knowing how much force was too much; and the boy, thinking that they didn't have to do much in a passive role, would end up not using enough force to counter the force of the active role.

    And so, as we see here, it's not surprising to see a spill or two from each couple before the night is out.