What's the deal with wheat and yeast? I've heard of people cutting out wheat, but no one has really told me why (other than s/he was allergic to wheat or thought s/he might be). What about yeast? Surely not because they're animals? (Strictly speaking, aren't they protozoa?)
I have heard of vegetarians eating shrimp because, supposedly, shrimp do not have nerve endings in their bodies and don't feel pain when killed.
Then there's the issue of cheese... Cheese is made (usually) with rennet, which comes from the cow's stomach lining, which means the animal is killed anyway...
(I'm not a vegetarian although I don't eat much meat, anyway)