Vatsyayana is a scholar (Rishi) from medieval (pre Muslim) India. He is known for writing the book on sex and love in sanskrit called Kama Sutra. Vatsyayana reportedly spent a major chunk of his life with prostitutes to research his subject.
Example Usage of Vatsyayana
hegdechai: Bad sex award winner J.Little on sex - 'a jolt that emptied my head like a spoon scraping the inside of a soft boiled egg'. O Vatsyayana!
sss4r: On page 45 of 264 of The Kama Sutra of Vatsyayana by Vatsyayanahttp://bit.ly/7gdE6h