There are hidden contradictions in the minds of people who "love Nature" while deploring the "artificialities" with which "Man has spoiled 'Nature.'" The obvious contradiction lies in their choice of words, which imply that Man and his artifacts are not part of "Nature" -- but beavers and their dams are. But the contradictions go deeper than this prima-facie absurdity. In declaring his love for a beaver dam (erected by beavers for beavers' purposes) and his hatred for dams erected by men (for the purposes of men) the Naturist reveals his hatred for his own race -- i.e., his own self-hatred.
--"Lazarus Long" (Robert A. Heinlein)
Well, it does depend on the effect, does it not? Is chemically induced sterility good for the human body? Does not the use of a condom—which was after all invented to prevent prostitutes from getting pregnant—not affect our attitudes toward our wives? Does not the use of contraceptives—and abortion—affect our attitudes toward the children we do have?