Above all the ancient Taoists were scientists. Taoists believed that wisdom came from accumulated knowledge subjected to scrutiny and deeper and deeper questioning. The Taoists had a purpose and a morality to their questioning and search for wisdom. They sought immortality and immunity from disease of all kinds. Very early in the ancient writings they realized that one of the keys to immortality was to hold themselves to higher ethical and moral standards. Only in the path of righteousness would it be possible to realize their goals. Unlike western religions, the Taoists were not inclined to lead a righteous life because they feared retribution from a vengeful god, but because it was the best way to achieve what they wanted to achieve. The choice is always presented in a way that acknowledges the full responsibility of the individual for what he does in the world. All aspects of life and living came under their scrutiny so it is not surprising that at some point they would turn their attention to sex.