Once upon a time my dad fried us up some Rocky mountain oysters.
If I recollect, he said "Here Alex, try this." and I don't think he necessarily divulged what they were.
Not gonna lie. They were actually pretty good. I come from a family of hunters so we have tried some pretty strange things.
Pancreas (sweetbreads we call em), brain, stomach lining (not so weird if you're Mexican ... Cuz menudo) are a few examples.