Note how dreadful the general attitude on sex is: since all [the accepted] philosophies damn man, his life, and the earth—men's attitude on sex is a degrading, ugly, corrupting evil, in all the many variations. And this is another proof that sex is the expression of one's entire philosophy and attitude toward life. Since most people's philosophy is a hodgepodge of contradictory bits, so is their attitude on sex. But man cannot exist without a basic philosophy, from which all his actions, emotions and desires will come.
The cheap little schools of "free love" attempt to glorify sex on a silly sort of materialistic basis—simply glorifying physical joy, considering themselves "vital as animals." They are unable to discover a moral, spiritual
premise to justify sex—so they try to enjoy it without any morality, and, of course, it doesn't work, it doesn't bring them any sort of spiritual happiness, and not even much satisfaction.
This is the same mistake as that of the materialists who—in protest against mystical morality—declare that existence on earth has nothing to do with and requires no morality. This attitude merely drives people back to church, to mystical morality—and people drag themselves back to it regretfully, reluctantly, knowing that it is unsatisfactory, that it cannot work—but knowing also that they cannot exist without some form of morality, some code of values. This is another example of the vicious cutting of man in two—and setting his spirit against his body
Ayn Rand, The Journals of Ayn Rand, p. 609 - 610.