From the perspective of a molecule of water, I don't think you can tell whether the wall you are in contact with was heated by other molecules like yourself, or

From the perspective of a molecule of water, I don't think you can tell whether the wall you are in contact with was heated by other molecules like yourself, or whether it was heated by an electrical resistor sitting behind it. It's just stainless steel at 95C or so that is touching your cheek.