It just hit me that Puff the Magic Dragon was Celiac. Let's review part of the song.
Puff the Magic Dragon (of course he was puffy, and a little bloated too)
Lived by the sea (spent a lot of time in the bathroom)
And frolicked in the autumn mist (used a vaporizer to clear his sinuses)
In a land called Honah Lee (in a land called Gluten-Free)
And of course, dragons don't have smooth skin either (DH). If he did breathe fire, it was probably just heartburn.
