We can assert that Tantra is the essence of Yoga. There exist three types of Tantra: white, black and grey. Indeed, White Tantra is unique and worthwhile, because neither the orgasm nor the ejaculation of semen exist in it.
White Tantra awakens the Kundalini, in other words, the Fire of the Holy Spirit. That fire fortifies the soul; it strengthens it and fills it with terribly divine igneous powers.
Sex Yoga states, “Poison must be transformed into medicine.” They understand by poison the lure of women and of spirituous beverages. In alchemical terms, we would say that it is necessary to transform lead into gold.
Indeed, Yoga is worthless without Tantra. Yoga is worthless without its sexual essence.