Talk:Magic/@comment-5837525-20140822062711

I wonder if traveling through the Crystal Mirror affects one's DNA, as far as changing brain physiology and chemical makeup. Could be that, if going from a world inhabited by one dominant species to one inhabited by another dominant species, the mirror alters the traveler's DNA in order to make the journey smoother.

It's a stretch, but it's the only explanation I can think of for how Twilight, a pony, could develop a crush on Flash Sentry, a human (and by extension how Spike, a dragon, would suddenly like dog treats).