Vatsyayana 
The Kama Sutra 

The Kama Sutra (/ˈkɑːmə ˈsuːtrə/; Sanskrit: कामसूत्र, About this soundpronunciation, Kāmasūtra) is an ancient Indian Sanskrit text on sexuality, eroticism and emotional fulfillment in life. Attributed to Vātsyāyana, the Kama Sutra is neither exclusively nor predominantly a sex manual on sex positions, but written as a guide to the "art-of-living" well, the nature of love, finding a life partner, maintaining one's love life, and other aspects pertaining to pleasure-oriented faculties of human life.