The end to be aimed at here is enlightenment.

Certainly knowledge can never be immoral, but nothing is gained by jumbling up knowledge and morality together.
In emphasizing the nature of the physician's task in this matter as purely and simply that of wise practical enlightenment, nothing is implied against the advantages, and indeed the immense value in sexual hygiene, of the moral, religious, ideal elements of life.

It is not the primary business of the physician to inspire these, but they have a very intimate relation with the sexual life, and every boy and girl at puberty, and never before puberty, should be granted the privilege--and not the duty or the task--of initiation into those elements of the world's life which are, at the same time, natural functions of the adolescent soul.

Here, however, is the sphere of the religious or ethical teacher.

At puberty he has his great opportunity, the greatest he can ever obtain.