Grizabella
sweet_intuition said:And there's no risk of getting icky navel lint stuck on the cards
Bellybuttons are very hard to shuffle, too.
I think Chronata put it very well, seconded by Umbrae. I think you could liken it to Rorschach (sp?) ink blots when you talk to them about it. Take along a selection of decks and let the audience try the cards out to see if it sparks anything for any of them.