Otherwise there is little likelihood of anything but friction and pain on one side or the other, and perhaps on both sides.
[4] The varying customs of different peoples in this matter are set forth by Westermarck, _The Origin and Development of the Moral Ideas_, Ch.

XXV.
The parents have not only to train their children: it is of at least equal importance that they should train themselves.

It is desirable that children, as they grow up, should be alive to this necessity, and consciously assist in the process, since they are in closer touch with a new world of activities to which their more lethargic parents are often blind and deaf.

For every fresh stage in our lives we need a fresh education, and there is no stage for which so little educational preparation is made as that which follows the reproductive period.

Yet at no time--especially in women, who present all the various stages of the sexual life in so emphatic a form--would education be more valuable.