When you get hungry, you look at all parts of the animal. Hogs are pretty easy to raise, and then kill for meat. Sausage of course can use intestines. Hot dogs?
Pig's feet? What's the weirdest thing you've ever eaten?
I've had escargot, raw oysters, seiche, foie gras, the seiche was really bizarre, to me. I had a chance at haggis in Scotland and demurred.