If this is not the case he must either be regarded as a radically abnormal person or as carried away by passion to a point of temporary insanity. The intimate connection of love with pain, its tendency to approach cruelty, is seen in one of the most widespread of the occasional and non-essential manifestations of strong sexual emotion, especially in women, the tendency to bite. We may find references to love-bites in the literature of ancient as well as of modern times, in the East as well as in the West. Plautus, Catullus, Propertius, Horace, Ovid, Petronius, and other Latin writers refer to bites as associated with kisses and usually on the lips. Plutarch says that Flora, the mistress of Cnæus Pompey, in commending her lover remarked that he was so lovable that she could never leave him without giving him a bite. In the Arabic _Perfumed Garden_ there are many references to love-bites, while in the Indian _Kama Sutra_ of Vatsyayana a chapter is devoted to this subject. Biting in love is also common among the South Slavs.[76] The phenomenon is indeed sufficiently familiar to enable Heine, in one of his _Romancero_, to describe those marks by which the ancient chronicler states that Edith Swanneck recognized Harold, after the Battle of Hastings, as the scars of the bites she had once given him. It would be fanciful to trace this tendency back to that process of devouring to which sexual congress has, in the primitive stages of its evolution, been reduced. But we may probably find one of the germs of the love-bite in the attitude of many mammals during or before coitus; in attaining a firm grip of the female it is not uncommon (as may be observed in the donkey) for the male to seize the female's neck between his teeth. The horse sometimes bites the mare before coitus and it is said that among the Arabs when a mare is not apt for coitus she is sent to pasture with a small ardent horse, who excites her by playing with her and biting her.[77] It may be noted, also, that dogs often show their affection for their masters by gentle bites. Children also, as Stanley Hall has pointed out, are similarly fond of biting.