When Kama is practised by men of the four castes according to the rules of the Holy Writ (_i.e._, by lawful marriage) with virgins of their own caste, it then becomes a means of acquiring lawful progeny and good fame, and it is not also opposed to the customs of the world. On the contrary the practice of Kama with women of the higher castes, and with those previously enjoyed by others, even though they be of the same caste, is prohibited. But the practice of Kama with women of the lower castes, with women excommunicated from their own caste, with public women, and with women twice married,[31] is neither enjoined nor prohibited. The object of practising Kama with such women is pleasure only. Nayikas,[32] therefore, are of three kinds, viz., maids, women twice married, and public women. Gonikaputra has expressed an opinion that there is a fourth kind of Nayika, viz., a woman who is resorted to on some special occasion even though she be previously married to another. These special occasions are when a man thinks thus:-- (_a_). This woman is self-willed, and has been previously enjoyed by many others besides myself. I may, therefore, safely resort to her as to a public woman though she belongs to a higher caste than mine, and in so doing I shall not be violating the ordinances of Dharma. Or thus:-- (_b_). This is a twice-married woman and has been enjoyed by others before me, there is, therefore, no objection to my resorting to her. Or thus:-- (_c_). This woman has gained the heart of her great and powerful husband, and exercises a mastery over him, who is a friend of my enemy; if, therefore, she becomes united with me, she will cause her husband to abandon my enemy. Or thus:-- (_d_). This woman will turn the mind of her husband, who is very powerful, in my favour, he being at present disaffected towards me, and intent on doing me some harm. Or thus:-- (_e_). By making this woman my friend I shall gain the object of some friend of mine, or shall be able to effect the ruin of some enemy, or shall accomplish some other difficult purpose. Or thus:-- (_f_). By being united with this woman, I shall kill her husband, and so obtain his vast riches which I covet. Or thus:-- (_g_). The union of this woman with me is not attended with any danger, and will bring me wealth, of which, on account of my poverty and inability to support myself, I am very much in need. I shall, therefore, obtain her vast riches in this way without any difficulty. Or thus:--