“Thus, for an adequate interpretation of the differences found between the classes or within the same class as regards their relation to the various legitimate arts, painting, music, theatre, literature etc., one would have to analyse fully the social uses, legitimate or illegitimate, to which each of the arts, genres, works or institutions considered lends itself. For example, nothing more clearly affirms one's 'class', nothing more infallibly classifies, than tastes in music.”