The Kama Sutra of Vatsyayana

The Kama Sutra (Sanskrit: कामसूत्र), (alternative spellings: Kamasutraṃ or simply Kamasutra), is an ancient Indian Hindu text widely considered to be the standard work on human sexual behavior in Sanskrit literature written by Mallanāga Vātsyāyana. A portion of the work consists of practical advice on sexual intercourse.
The Kama Sutra is the oldest and most notable of a group of texts known generically as Kama Shastra (Sanskrit: Kāma Śāstra). Traditionally, the first transmission of Kama Shastra or "Discipline of Kama" is attributed to Nandi the sacred bull, Shiva's doorkeeper, who was moved to sacred utterance by overhearing the lovemaking of the god and his wife Parvati and later recorded his utterances for the benefit of mankind.[