Meat does not sit in your intestines and rot (unless you call being digested rotting, I suppose). Anyone thinking this should consult a GI doctor. The walls of the intestine are lined with “smooth” muscles that have evolved to move food along. I hesitated to even post this because I’m not a doctor and therefore no one should take my word for it, but the fact of the matter is that most people who spout this nonsense aren’t either. It’s not a mystery. All it takes to find out is to go to a specialist and get it straight from them. GI doctors don’t get bombarded by patients with rotting meat in their digestive tracts. If this were really true, it would be an epidemic. Most of the people who support this idea are supporters of either herbal cleanses (which do nothing) or colon cleanses (which at most simply expel the waste that you’d have expelled the following day anyway). Either that or they’ll just perforate your bowel. Fun.