reason to suppose that the nervous energy expended in an explosion of the tension of the sexual organs may sometimes relieve the bladder; it is well recognized that a full bladder is a factor in producing sexual emissions during sleep, the explosive energy of the bladder being inhibited and passing over into the sexual sphere.  Conversely, it appears that explosion of the bladder relieves sexual tension.  An explosion of the nervous centers connected with the contraction of the bladder will relieve nervous tension generally; there are forms of epilepsy in which the act of urination constitutes the climax, and Gowers, in dealing with minor epilepsy, emphasizes the frequency of micturition, which “may occur with spasmodic energy when there is only the slightest general stiffness,” especially in women.  He adds the significant remark that it “sometimes seems to relieve the cerebral tension,"[53] and gives the case of a girl in whom the aura consisted mainly of a desire to urinate; if she could satisfy this the fit was arrested; if not she lost consciousness and a severe fit followed.

If micturition may thus relieve nervous tension generally, it is not surprising that it should relieve the tension of the centers with which it is most intimately connected.  Serieux records the case of a girl of 12, possessed by an impulse to masturbation which she was unable to control, although anxious to conquer it, who only found relief in the act of urination; this soothed her and to some extent satisfied the sexual excitement; when the impulse to masturbate was restrained the impulse to urinate became imperative; she would rise four or five times in the night for this purpose, and even urinate in bed or in her clothes to obtain the desired sexual relief.[54] I am acquainted with a lady who had a similar, but less intense, experience during childhood.  Sometimes, especially in children, the act of urination becomes an act of gratification at the climax of sexual pleasure, the imitative symbol of detumescence.  Thus Schultze-Malkowsky describes a little girl of 7 who would bribe her girl companions with little presents to play the part of horses on all fours while she would ride on their necks with naked thighs in order to obtain the pleasurable sensation of close contact.  With one special friend she would ride facing backward, and leaning forward to embrace her body impulsively, and at the same time pressing the neck closely between her thighs, would urinate.[55] Fere has recorded the interesting case of a man who, having all his life after puberty been subject to monthly attacks of sexual excitement, after the age of 45 completely lost the liability to these manifestations, but found himself subject, in place of them, to monthly attacks of frequent and copious urination, accompanied by sexual day-dreams, but by no genital excitement.[56] Such a case admirably illustrates the compensatory relation of sexual and vesical excitation.  This mutual interaction is easily comprehensible when we recall the very close nervous connection which exists between the mechanisms of the sexual organs and the bladder.