“The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff.” - Carl Sagan, Cosmos

Freedom and autonomy are the highest ideal. If I recognize that everyone else has that same right to freedom and autonomy, I should not act in such a way that infringes on those rights. This can be boiled down to one word: Consent.

You are not your body. You are not your thoughts.