"While it is true as a fact affirmed by constant observation that men have stronger passions than women, in general and that many men demand of their wives a degree of sexual indulgence which is the cause of serious injury to them, and even impossible for them to grant without doing themselves the greatest wrong, it is by no means proven either that these demands are imperative, that they are natural, or that they are not injurious to the man as well as the woman, much less beneficial to either. On the contrary, there is a great a weight of evidence as could be required that restraint, self-control, and moderation in the exercise of the sexual instinct is in the highest degree beneficial to man, as well as to woman, and necessary for his highest development."