Tantra is older than fuck. More like the conscious sexuality movement emerged from tantra. While perhaps in the West it’s become a segment of a contemporary movement and in the East where it originated it’s a lost art, there are probably parts of India where it remains a central practice. Forms of tantra can be found among other indigenous cultures as well. For a great read with copious erotic art illustrations, I highly recommend Indra Sinha’s book, Tantra, The cult of ecstasy.