Now you got me I trigued. I once planted a whole tray of papaya seeds from a fruit I ate, just for fun, and they ALL came up. Very easy to start from seed. I don't remember now why I couldn't/didn't keep any of them.
I know one reason I haven't tried again is I wasn't thrilled with the fruit, though I have heard that is is very healthy, including promoting digestion.
If anyone has recipe ideas, please post them in the Recipes Forum. Maybe I'lll try this again.