ased prostitute infects another person, and
is unable to pay the very heavy damages which should be demanded in such a
case, she ought to be secluded and subjected to treatment. That is
necessary in the interests of the community. But it is also necessary, to
avoid placing a premium on the commission of an offence which would ensure
gratuitous treatment and provision for a prostitute without means, that
she should be furnished with facilities for treatment in any case.

[251] It has, however, been decided by the Paris Court of Appeal that for
a husband to marry when knowingly suffering from a venereal disease and to
communicate that disease to his wife is a sufficient cause for divorce
(_Semaine Medicale_, May, 1896).

[252] The large volume, entitled _Sexualpaedagogik_, containing the
Proceedings of the Third of these Congresses, almost ignores the special
subject of venereal disease, and is devoted to the questions involved by
the general sexual education of the young, which, as many of the speakers
maintained, must begin with the child at his mother's knee.

[253] "Workmen, soldiers, and so on," Neisser remarks (Senator and
Kaminer, _Health and Disease in Relation to Marriage_, vol. ii, p. 485),
"can more easily find non-prostitute girls of their own class willing to
enter into amorous relations with them which result in sexual intercourse,
and they are therefore less exposed to the danger of infection than those
men who have recourse almost exclusively to prostitutes" (see also Bloch,
_Sexualleben unserer Zeit_, p. 437).

[254] The character and extent of such lectures are fully discussed in the
Proceedings of the Third Congress of the German Society for Combating
Venereal Diseases, _Sexualpaedagogik_, 1907.

[255] I leave out of account, as beyond the scope of the present work, the
auxiliary aids to the suppression of venereal diseases furnished by the
promising new methods, only now beginning to be understood, of treating or
even aborting such diseases (see, e.g., Metchnikoff, _The New Hygiene_,
1906).

[256] Max von Niessen, "Herr Doktor, darf ich heiraten?" _Mutterschutz_,
1906, p. 352.

CHAPTER IX.

SEXUAL MORALITY.

Prostitution in Relation to Our Marriage System--Marriage and
Morality--The Definition of the Term "Morality"--Theoretical Morality--Its
Division Into Traditional Morality and Ideal Morality--Practical
Morality--Practical Morality Based on Custom--The Only Subject of
Scientific Eth