I read about "Rocky Mt Oysters" in Elementary school.
I have eaten:
Heart (many kinds)
Liver (many kinds)
Kidneys (rabbit, cow, and deer)
Gizzards (chicken, turkey, pheasant, duck, goose)
Dog (In Vietnam, because I thought they said "Duck")
And I've eaten many other things, but I don't think I could eat a pair of balls (or even a single nut). Must be the Yankee in me.
Sorry----I always left them with the gut-pile.