The kiss by contact between the lips or neighbouring parts of the skin is of European origin, and even here is a comparatively recent practice, for the ancients very rarely allude to it. Its erotic significance was early pointed out by Indian, Oriental, and Roman poets. Amongst the Mongol races the so-called olfactory kiss (“smell-kiss”) is in much more common use. In this the nose is apposed to the cheek of the beloved person, and the expired air and the odour arising from the cheek are inhaled. With the diffusion of European civilization, the European kiss of contact has also been diffused. It is no longer possible to determine whether the peculiar connexion between the lips and the genital organs, as manifested for example by the growth of hair on the upper lip at puberty in the male sex, and also by the well-known thick “sensual” lips often seen in individuals with exceptionally powerful sexual impulses, is originally primary, or merely a secondary result of the employment of the lips in a sexual caress.[12] To our consideration of the kiss we may naturally append a few remarks on the rôle of the =sense of taste= in human love. Inasmuch as taste is almost invariably closely connected with smell, we are rarely able to prove in an individual case whether an impression of taste or an impression of smell more powerfully affects the _vita sexualis_. In kissing, an unconscious tasting of the beloved person seems often to play a part; and as regards the kissing of other parts of the body, especially the genital organs, at the acme of sexual excitement this undoubtedly often occurs. In Norwegian folk-tales, and in a South Hungarian song published by Friedrich S. Krauss, this tasting of the woman is very realistically described. The taste for sweets has also been largely associated with sexuality. Children who are fond of sweets, who have, as it is called, a sweet tooth, are also sensually disposed, sexually more excitable, and more inclined to the practice of onanism, than other children. The sensory impulses have therefore been classified as the hunger impulse and the sexual impulse respectively. A certain amount of truth appears to lie in these observations. Much greater influence than these lower senses possess is exerted in the sexual sphere on modern civilized man by the higher, truly =intellectual= senses, =sight= and =hearing=. With the adoption of the upright posture they gained an advantage over the sense of smell and taste. In his work “Ideas Concerning the Philosophy of Human History” Herder writes: