"Really now. How interesting. I guess that makes sense. I mean, most species of fairies like offerings of milk and honey, at least from my experience they do. Whenever I end up in a magic forest I leave some out in a little tin with some bread soaked in it so they don't eat me in my sleep. But they do leave this powder when they take it. I had it tested the next time I was in town and turns out it's this really powerful sleeping powder that comes from when fairies shed their fairy dust or something? I don't know the true schematics behind it but it's something like that. It's supposed to give this really deep, healing sleep but it doesn't feel very good. From what I've seen it only comes from a few specific subspecies of fairies? I think only two or three. All I know is the main one is supposedly beautiful but can only be seen by virgins."
(Did I steal this from one of my favorite fanfictions that has fairies? Maybe~)