I once read a quote, I can't remember where, it might've been in a Buddhist text but it was something like: Your body does not belong to you, it's not yours to abuse. It does not belong to the ego.

I never thought of it this way but it gelled with me immediately and I really think it's true, the body supports the mind which supports the concept of self. So if the self decides to trash the body, something isn't right about that contract.