Forcing my hand on Wednesday's:
she never wondered whether he was true to her or not; she knew he was. She knew, even though she was too young to know the reason, that indiscriminate desire and unselective indulgence were possible only to those who regarded sex and themselves as evil.
Rand, Ayn (2005-04-21). Atlas Shrugged: (Centennial Edition) (p. 109). Penguin Group. Kindle Edition.
Left to the reader: are the Heinlein and Rand quotes contradictory?
Agreed. Thanks for playing.