Kamasutra
The Kamasutra is an ancient Indian text on love, relationships, and sexuality. In popular culture, it is mainly associated with a wide variety of sexual positions, but in fact it also deals with desire, relationships, etiquette, and social life. It is considered a classic work of Indian literary and cultural history.
In modern usage, the term is often used as a synonym for sexual variety and physical flexibility. Some positions can be physically demanding, so comfort, consent, and attention to pain or physical limitations should always come first. Acrobatic or risky experimentation without preparation is not advisable.