The opinions of writers of note are given in the following quotations:—
"The approach of the sexes is, in its purest condition, the result of a natural instinct, the end of which is the reproduction of the species. Still, however, we are far from saying that this ultimate result is, in any proportion of cases, the actual thought in the minds of the parties engaged."
"The very lively solicitations which spring from the genital sense, have no other end than to insure the perpetuity of the race."[12]
12 Dr. Gardner.
"Observation fully confirms the views of inductive philosophy; for it proves to us that coitus, exercised otherwise than under the inspirations of honest instinct, is a cause of disease in both sexes, and of danger to the social order."[13]
13 Mayer.
"It is incredible that the act of bringing men into life, that act of humanity, without contradiction of the most importance, should be the one of which there should have been the least supposed necessity for regulation, or which has been regulated the least beneficially."[14]
14 Dunoyer.
"But it may be said that the demands of nature are, in the married state, not only legal, but should be physically right. So they are, when our physical life is right; but it must not be forgotten that few live in a truly physical rectitude."[15]