Aristotle, Nicomachean Ethics
H. Rackham, Ed.

It is therefore clear that we must pronounce the admittedly disgraceful pleasures not to be pleasures at all, except to the depraved.

But among the pleasures considered respectable, which class of pleasures or which particular pleasure is to be deemed the distinctively human pleasure? Perhaps this will be clear from a consideration of man's activities. For pleasures correspond to the activities to which they belong; it is therefore that pleasure, or those pleasures, by which the activity, or the activities, of the perfect and supremely happy man are perfected, that must be pronounced human in the fullest sense. The other pleasures are so only in a secondary or some lower degree, like the activities to which they belong.