The secret aspect of Tantric rituals, also called Vamamarga, is totally removed from conventional norms of Hindu worship. While secret rituals may also include many aspects of conventional worship, it mainly deals with sensate rites, involving all the senses. Hence, this kind of worship would include themes such as feasting (representing sustenance); intercourse (embodying sexuality, fertility, and procreation) and urination, defecation and vomiting (symbolizing removal of wastes). Hence, Tantra involves the devotee working along with Nature and not against it.