Tantric sex, in brief, is based on the female partner using her PC muscles (the same muscles used to stop the flow of urine) to delay orgasm. The practice is said to come from Buddhist tantra (any of several esoteric traditions rooted in the religions of India.).

Origins of Tantra and Tantric Sex – The Nath Tradition

[video]http://youtube.com/watch?v=_XXrrXOc6nI[/video]
Yogiraj is a living master and solar seer, and helps sincere practitioners of yogic meditation awaken to higher levels of consciousness through chakra awakening/activation and esoteric practices of Himalayan yoga.