sex-mystery

noun3

1. •
   Sex conceived of as a mystical or magical phenomenon.

   • What more clear than that the conjunction of Tree and Serpent is the fulfilment in nature of that sex-mystery which is so potent in the life of man and the animals? — 1920
2. •
   Lack of knowledge about sexuality and sexual behaviour resulting from a lack of sex education.

   • Women will be in a position to compete with man in every way. They will wear trousers. Rational birth control will free women for education, and quaint clothes and the sex mystery must go. — 1925
3. •
   A secret religious celebration involving sexual intercourse.