This article is from the Magick Tantra FAQ, by Tyagi Nagasiva email@example.com, Catherine Yronwode firstname.lastname@example.org with numerous contributions by others.
Worship of the generative organs is found in many
schools of tantra yoga. This can take the form of
presenting offerings of flowers and/or food to the sex
organs of a living man or woman, to a statue of a deity,
or to a simple effigy that symbolizes the yoni (vulva)
or lingam (penis). In karezza, such worship is modified
and subdued, but is found in the form of offerings of
flowers, poetry, and other tokens of affection to the
lover. In neo-tantra, meditative sexual massage is
sometimes seen as a form of puja.