But then you get into the whole debate of what love is. For instance, the chick in the episode about the wishing well. Was she in love? How do you define it? What's the difference between love and infatuation? And if love can be caused by supernatural influences, like the magic coin, then the fact that Mary and John loved each other during the events of 5.13 isn't proof of anything, since they were by that time already "under the influence", if you'll pardon the pun.