In the act of intercourse the woman must always play the more passive part; she must be desired, rather than desire. Woman’s modesty increases man’s desire. By this coquetry, permissible because natural, the woman can bind the man to herself, and can give the lie to the assertion that marriage is the grave of love. Partial concealment of her desire on the part of the woman is more stimulating to the man than an open manifestation of the sexual impulse; and a certain amount of modest reluctance is more alluring to him than a plain invitation. Plenty of room must be left for the play of fancy and imagination. _Schiller_ makes Fiesco say to the Countess Julia, as he covers up her bosom, “The senses must be blind letter-carriers only, and must not be aware of that which nature and the imagination communicate each to the other. The best of news is stale as soon as it has become the talk of the town.” For this reason, also, it is more suitable that intercourse should take place, not by day, consequent on the brutal prompting of vision, but by night only, beneath the protecting veil of darkness. A night’s rest, moreover, will serve to restore the exhausted nerves, and to replace the expended secretions. Less advisable is coitus in the morning, on awaking from sleep, since the labors of the day must immediately thereafter be undertaken. Partially impotent men only, who wake up with an erected penis, endeavour to avail themselves without delay of this favorable opportunity, bearing in mind the French proverb, “On aime quand on peut, et non pas quand on veut.” The French custom, in accordance with which the married pair sleep together in a double-bed is undesirable on several hygienic grounds, and, in the first place, for the reason that this continuous nocturnal proximity is likely to give rise to the habit of indulging in excessively frequent acts of intercourse. The best and most affectionate of men has neither disposition nor capacity to play the part of Romeo every night, and thus the value and enjoyment of marital duties becomes lessened. The fulfilment of his desires should not be rendered quite so easy to the husband; he should always appear the lover, one who seeks a woman’s favours because he longs for her; he should not be the master, exacting an unquestioned right. For this reason, separate beds are advisable for the married pair, and, when possible, even separate bedrooms.