Critique of Judgement by Immanuel Kant Chapter 17 Page 9

But the Imagination does this by means of a dynamical effect, which arises from the various impressions of such figures on the organ of internal sense.) If now in a similar way for this average man we seek the average head, for this head the average nose, etc., such figure is at the basis of the normal Idea in the country where the comparison is instituted. Thus necessarily under these empirical conditions a negro must have a different normal Idea of the beauty of the [human figure] from a white man, a Chinaman a different normal Idea from a European, etc. And the same is the case with the model of a beautiful horse or dog (of a certain breed). — This normal Idea is not derived from proportions got from experience [and regarded] as definite rules; but in accordance with it rules for judging become in the first instance possible.