Neo-Tantra
Classical Sanskrit tantric texts are overwhelmingly concerned with ritual, cosmology and liberation, not sexual technique. The specifically sexualised Western version traces to a named American organisation founded in 1905 and was later massively popularised by an Indian guru's ashram teaching from the mid-1970s onward.
Pierre Bernard's Tantrik Order in America (1905); Hugh Urban's 2003 documentation of the Rajneesh ashram's role from 1974
A modern Western movement presenting tantra primarily as a system of sacred sexuality, marketed as ancient Indian sexual wisdom.