“The highest pleasure in terms of matter is sex pleasure. The whole world is moving under its spell, and a materialist cannot work at all without this motivation. But a person engaged in Krishna consciousness can work with greater vigor without sex pleasure, which he avoids. That is the test in spiritual realization. Spiritual realization and sex pleasure go ill together. A Krishna conscious person is not attracted to any kind of sense pleasure due to his being a liberated soul.” (Shrila Prabhupada, Bhagavad-gita, 5.21 Purport)