 “Your body is a temple,” the saying goes. A temple to whom? If it’s yours, then clearly you should get to decide the rules – haircuts, tattoos, piercings, sex hormones, giving and taking blood. All else equal, no one can tell you what to do with your body. But if it’s a temple to someone else – say, God – then the choice is not really yours to make. You’re the custodian, not the caller of shots, and you should treat your body with the same kind of gingerly respect that you would show as a guest in someone else’s home. Their temple, their rules.