The Kama Sutra dates back to about 400 CE, about 1,600 years. It is a manual for developing the erotic sensibilities, knowledge and skill, including specific instruction on sexual techniques, as well as many other sensual and cultural expressions, referred to as the 64 arts. The approach to sex in the Kama Sutra is from a secular (non-religious, non-spiritual) perspective, whereas Tantra is definitely spiritual. The Kama Sutra does not in any way deny the value of spiritual practice, it is just not presenting that perspective. Tantra is all about awakening to full enlightenment, while the Kama Sutra is about great, satisfying, fulfilling sex, primarily between heterosexual couples. In the Kama Sutra sex was considered an essential aspect of everyone’s education. Sexual knowledge and skill were considered to be evidence of achievement, refinement, intelligence, psychological maturity, and part of the good life—the book was actually directed toward the upper class, educated, economically affluent portion of the population.