They were in almost every flyer! I had never heard of them before, but decided to buy one on a whim. Just one, in case they weren't any good.
So it sat on my counter for six days. Six days I watched it get riper and riper, and I still had no idea how to eat it or what it would taste like.
Today I bit the bullet. I looked up "how to eat a persimmon" and read the first non-video page.