You read nothing of this, did you? The fraction of the human body that’s 1 mm below the surface is small, and the fraction of the other body that’s 1 mm away from any single point is even smaller, and the two get multiplied for an insignificant fraction of the total mass. Come back when you understand what ∰ means, or at least read my other comment about people bent over to share a center of mass.
You read nothing of this, did you? The fraction of the human body that’s 1 mm below the surface is small, and the fraction of the other body that’s 1 mm away from any single point is even smaller, and the two get multiplied for an insignificant fraction of the total mass. Come back when you understand what ∰ means, or at least read my other comment about people bent over to share a center of mass.