Tantra, in Sanskrit, literally means "loom" or "thread", in the sense that everyone is totally connected to each other by our divine essence, as if all of us are woven into a single tapestry. Tantra is a tradition and meditation path in both Hinduism and Buddhism.
Tantric Sex refers to practices that strive to connect the spirits and consciousness of sexual partners so that their individual identities merge through the act of lovemaking into one transcendant state of bliss that they both share.
"Tantra is that Asian body of beliefs and practices which, working from the principle that the universe we experience is nothing other than the concrete manifestation of the divine energy of the godhead that creates and maintains that universe, seeks to ritually appropriate and channel that energy within the human microcosm in creative and emancipatory ways. Common variations include visualizing the deity in the act of sexual union with a consort; visualizing oneself as the deity...Occasionally non-standard or ritualized sex may be undertaken.""
- David Gordon White