Restif de la Bretonne (Monsieur Nicolas, vol. vi, p. 223) quotes a young girl who well describes the difference which love makes to a woman: "Before I vegetated; now all my actions have a motive, an end; they have become important. When I wake my first thought is 'Someone is occupied with me and desires me.' I am no longer alone, as I was before; another feels my existence and cherishes it," etc.
"One is surprised to see in the south," remarks Bonstetten, in his suggestive book, L'Homme du Midi et l'Homme du Nord (1824),—and the remark by no means applies only to the south,—"how love imparts intelligence even to those who are most deficient in ideas. An Italian woman in love is inexhaustible in the variety of her feelings, all subordinated to the supreme emotion which dominates her. Her ideas follow one another with prodigious rapidity, and produce a lambent play which is fed by her heart alone. If she ceases to love, her mind becomes merely the scoria of the lava which yesterday had been so bright."
Cabanis had already made some observations to much the same effect. Referring to the years of nubility following puberty, he remarks: "I have very often seen the greatest fecundity of ideas, the most brilliant imagination, a singular aptitude for the arts, suddenly develop in girls of this age, only to give place soon afterward to the most absolute mental mediocrity." (Cabanis, "De l'Influence des Sexes," etc., Rapports du Physique et du Morale de l'Homme.)
This phenomenon seems to be one of the indications of the immense organic significance of the sexual relations. Woman's part in the world is less obtrusively active than man's, but there is a moment when nature cannot dispense with energy and mental vigor in women, and that is during the reproductive period. The languidest woman must needs be alive when her sexual emotions are profoundly stirred. People often marvel at the infatuation which men display for women who, in the eyes of all the world, seem commonplace and dull. This is not, as we usually suppose, always entirely due to the proverbial blindness of love. For the man whom she loves, such a woman is often alive and transformed. He sees a woman who is hidden from all the world. He experiences something of that surprise and awe which Dostoieffsky felt when the seemingly dull and brutish criminals of Siberia suddenly exhibited gleams of exquisite sensibility.
In women, it must further be said, the sexual impulse shows a much more marked tendency to periodicity than in men; not only is it less apt to appear spontaneously, but its spontaneous manifestations are in a very pronounced manner correlated with menstruation. A woman who may experience almost overmastering sexual desire just before, during, or after the monthly period may remain perfectly calm and self-possessed during the rest of the month. In men such irregularities of the sexual impulse are far less marked. Thus it is that a woman may often appear capricious, unaccountable, or cold, merely because her moments of strong emotion have been physiologically confined within a limited period. She may be one day capable of audacities of which on another the very memory might seem to have left her.
Not only is the intensity of the sexual impulse in women, as compared to men, more liable to vary from day to day, or from week to week, but the same greater variability is marked when we compare the whole cycle of life in women to that of men. The stress of early womanhood, when the reproductive functions are in fullest activity, and of late womanhood, when they are ceasing, produces a profound organic fermentation, psychic as much as physical, which is not paralleled in the lives of men. This greater variability in the cycle of a woman's life as compared with a man's is indicated very delicately and precisely by the varying incidence of insanity, and is made clearly visible in a diagram prepared by Marro showing the relative liability to mental diseases in the two sexes according to age.[[180]] At the age of 20 the incidence of insanity in both sexes is equal; from that age onward the curve in men proceeds in a gradual and equable manner, with only the slightest oscillation, on to old age. But in women the curve is extremely irregular; it remains high during all the years from 20 to 30, instead of falling like the masculine curve; then it falls rapidly to considerably below the masculine curve, rising again considerably above the masculine level during the climacteric years from 40 to 50, after which age the two sexes remain fairly close together to the end of life. Thus, as measured by the test of insanity, the curve of woman's life, in the sudden rise and sudden fall of its sexual crisis, differs from the curve of man's life and closely resembles the minor curve of her menstrual cycle.
The general tendency of this difference in sexual life and impulse is to show a greater range of variation in women than in men. Fairly uniform, on the whole, in men generally and in the same man throughout mature life, sexual impulse varies widely between woman and woman, and even in the same woman at different periods.