If your body is your private property, then anyone trying to trespass without your consent is initiating force and enforcing is not initiation of force. I consider the fruit of my labor to be, like my body, my private property and anyone trespassing it without my consent is initiating force.
Most people protect their body, because they have instinct for self-preservation, regardless of their beliefs about property. You presented no argument why we should treat natural resources or fruit of labor the same as human body. You just assume Libertarian definitions. It's a bit like fundamentalist religious person saying "I consider love to be a product of a god, so you feeling love confirms gods existence." There is no interesting argument in that statement.
Actually most mammals instinctively defend with force the fruit of their labor or their private property. Just try to steal a monkey's food of try to walk on the land of a lion he peed on to mark it as his and see what happens to you. It's natural to most mammals (and even reptiles) to protect their private property and fruit of labor as if it was their own body because their survival depends on these things not being trespassed.
We're animals too, mammals to be precise, sounds like an honest cherry-picked as it's literally the family of animals we belong to. Hard to fight one of our most basic animal nature: the defense of our body and personal territory and property.
