The seeker of love is by nature polygamous, while the slave of love is, as a rule, monogamous (and consequently has little success with the opposite sex). Both aspire to a union of sensual and spiritual eroticism, but in both cases the union is a failure. All the repulsive and terrible manifestations of these perversions which have been recorded, can easily be shown to fit my theory. In psychological research it is merely a question of selecting the great types from the mass of phenomena and determining them correctly. The so-called _fetichist_, too, whose passion is roused by indifferent objects which belonged, or might belong, to the beloved, or in fact to any woman, is a variant of the slave of love. The classical representative of fetichism is the mediaeval knight who carried a handkerchief, a glove, or any other article of clothing belonging to his lady, next to his heart, thus believing himself proof against evil influences. There we see already spiritual love groping for material objects in order to gain earthly support; not every man is a Dante, not every man is capable of keeping his soul free from the taint of this earthly sphere. But even the "plait-cutter," so well known to the reader of newspapers, the collector of garters, and similar desperadoes, require a relic, a fetich which they apparently worship. To the same category belongs the idolatrous cult which some men, especially artists--but also madmen--practise with female pictures and statues (more especially with heads). In this case the fundamental feeling of the love of beauty, which we know as an essential factor of purely spiritual eroticism, is made to serve sensual purposes. The desired illusion of spiritual worship is facilitated, and is protected from self-revelation, owing to the fact that a painted head rouses in the normal individual no passion, but inspires him with purely spiritual sentiments.