Tantra or Tantra Yoga
Yoga means union, the union or unification of the human self with the divine, spiritual or soul self. There are various yoga’s which means there are various paths to accomplish this union. Tantra is the path to union by means of ecstasy. Sexual ecstasy being possibly the most important ecstatic experience and certainly the most present but not the only one.
See: SpiritualPaths,
Sex,
Orgasm.