Shut your eyes, and for ten seconds check whether you now have the slightest evidence of a headpiece occupying the centre of your world, of a some-thing here that has any discernable boundaries or shape or size or colour or opacity - let alone eyes or nose or ears or mouth. (Aches and tickles and tastes and so on don’t begin to make up a head, aren’t like that at all.) Or, for that matter, have you the slightest evidence right now of a body?
