Being familiar with furries and their odd predilictions, the boytaurs didn't surprise me - well, not too much. And slash fiction has dozens upon dozens of forums, and tons of fans. Nothing surprising there. Not my thing, but I know plenty of folks - all women - who are really quite into it.
What got me was a forum for chewing ice. Uh, what is there to talk about? I mean, I've been known to crunch on a cube myself. And I guess it makes some of my friends cringe. But I never thought about it much, and certainly never felt the need to write about it or find a like-minded community. Huh. Much stranger than the chicken thing - even with costumes.