Cow tongue is one of my favorite types meat.. Delicious!! Especially the back part of it is the best. The tip has kind of a different taste.
I've eaten sheep feet before but never tried pig's. It tastes pretty good too.
If you keep worrying about what a food actually is and refuse to eat it just for that reason, you'll be missing a lot and i feel sorry for you.
I've tasted many other extra-ordinary type of foods and of course i didnt like every single one of them but there are also very unique tastes you won't find anywhere else. You can't eat this kinda stuff all the time because your body may not be really used to it.. But it is always worth it to try and taste some different food every once in a while; its good for culture.
I love the soup made from the cow stomach. And the grill made from the intestines of a sheep. yum! Chicken heart is also great.
Stuff that i tasted and didnt like are, sheep brain, liver and goat balls (yes, i ate goat balls once).
Actually there is a pack of cow stomach sitting in my freezer right now... wonder if i should cook it sometime soon
