Sexual rituals fall into two categories: culture-created, and natural behaviour, the human animal having developed sex rituals from evolutionary instincts for reproduction, which are then integrated into society, and elaborated to include aspects such as marriage rites, dances, etc. Arguably indeed, 'sex in its more ritualized and symbolic varieties...has moulded the shape of civilization'. Desmond Morris, The Naked Ape Trilogy (London 1994) p. 246 and p. 34 Sometimes sexual rituals are highly formalized and/or part of religious activity, as in the cases of hieros gamos, the hierodule and the Ordo Templi Orientis (OTO). Contemporary sacred sexual rituals have been tagged as 'structured, symbolic, manifestation, ceremonies, tradition, everyday, habit, grounding, magic, solemn'."Sacred Sexual Rituals" p. 3
Sexual rituals fall into two categories: culture-created, and natural behaviour, the human animal having developed sex rituals from evolutionary instincts for reproduction, which are then integrated into society, and elaborated to include aspects such as marriage rites, dances, etc. Desmond Morris, The Naked Ape Trilogy (London 1994) p. 246 and p. 34 Sometimes sexual rituals are highly formalized and/or part of religious activity, as in the cases of hieros gamos, the hierodule and the Ordo Templi Orientis (OTO). 
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Arguably indeed, 'sex in its more ritualized and symbolic varieties...has moulded the shape of civilization'.
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Contemporary sacred sexual rituals have been tagged as 'structured, symbolic, manifestation, ceremonies, tradition, everyday, habit, grounding, magic, solemn'."Sacred Sexual Rituals" p. 3