Question of the Day?

As I was bored at work and we'd already played 20 questions for about 2 hours (fire exit, chewing gum, dinosaur.. all good ones!) and after 2 hours of 20 questions your brain starts to disintegrate. Our conversations became incoherent and incomprehensible and then we came up with the most important question of them all. Let me put some background to it: So your ship/plane/car crashed in the middle of a tropical island, with no one around and nothing edible to eat. After 7 starving days you get to thinking you have to survive somehow, so to the question: If you were a Cannibal (or stranded) and you started eating yourself, how far would you get before you died? Its a bit of a trick question, since your eating yourself you'll be bleeding to death but your also receiving nutrition and the other part is, when would you get full? My friend said he reckon he could eat a leg and a half. Then later on while drinking someone pointed out that they could survive for much longer by taking small bites and letting yourself heal, then continuing to eat ever so often. Let me know what you think?