 Perhaps there is only one true pleasure of blissful freedom from stress, present in all apparently diverse pleasures, including those of the hot bath, sexual consummation, youthful friendship, and freedom from responsibility for children which figured in the short Afghan list of §2.1 – and its impure mixtures with frights and with the burning pains of hot spice are only due to ways it can be caused due to our biology and past conditioning. Or perhaps there will be much more intrinsic, and not merely causally relational, diversity. How we and our hedonic experience are situated or constituted in our brains and organisms remains to be seen. And bringing normative wisdom to bear on emerging physiology will presumably be called for, at least to the extent that the concept of pleasure, at least in its primary use by naive experiencers (who seem to fix the reference of the term in part through pleasure presenting as good to them), is an evaluative and normative one, however legitimately this may bracketed by scientists and philosophers when theorizing about it. (Cf. Sidgwick 1907, 129, on the Stoics taking this appearance to be an always deceptive one, and not only, perhaps like Plato [Moss 2006] and Aristotle [Moss 2012], as an occasionally corrigible one.)