Indian logician, author of Kama Sutra
Vātsyāyana, also spelled Vatsayana, is an ancient Indian philosopher, known for writing the Kama Sutra, the most ancient book in the world on human sexuality. He lived in India during the second or third century CE, probably in Pataliputra (modern day Patna). He is not to be confused with Pakṣilasvāmin Vātsyāyana, the author of Nyāya Sutra Bhāshya, the first preserved commentary on Gotama's Nyāya Sutras. His name is sometimes erroneously confused with Mallanaga, the prophet of the Asuras, to whom the origin of erotic science is attributed.
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When all three viz., Dharma, Artha, and Kama together, the former is better than the one which follows it, i.e., Dharma is better than Artha, and Artha is better than Kama. But Artha should be always practiced by the king, for the livelihood of men is to be obtained from it only. Again, Kama being the occupation of public women, they should prefer to the other two, and these are exceptions to the general rule.