Everything relating to the problem of pleasure and pain touches one of the weakest spots of present-day psychology. We shall try if possible to learn something from the determinations of the case in question and to avoid encroaching on the problem as a whole. Let us first glance at the manner in which the erogenous zones adjust themselves to the new order of things. An important rôle devolves upon them in the preparation of the sexual excitation. The eye which is very remote from the sexual object is most often in position, during the relations of object wooing, to become attracted by that particular quality of excitation, the motive of which we designate as beauty in the sexual object. The excellencies of the sexual object are therefore also called "attractions." This attraction is on the one hand already connected with pleasure, and on the other hand it either results in an increase of the sexual excitation or in an evocation of the same where it is still wanting. The effect is the same if the excitation of another erogenous zone, e.g., the touching hand, is added to it. There is on the one hand the feeling of pleasure [which] soon becomes enhanced by the pleasure from the preparatory changes, and on the other hand there is a further increase of the sexual tension which soon changes into a most distinct feeling of displeasure if it cannot proceed to more pleasure. Another case will perhaps be clearer; let us, for example, take the case where an erogenous zone, like a woman's breast, is excited by touching in a person who is not sexually excited at the time. This touching in itself evokes a feeling of pleasure, but it is also best adapted to awaken sexual excitement which demands still more pleasure. How it happens that the perceived pleasure evokes the desire for greater pleasure, that is the real problem.
Fore-pleasure Mechanism.—But the rôle which devolves upon the erogenous zones is clear. What applies to one applies to all. They are all utilized to furnish a certain amount of pleasure through their own proper excitation, which increases the tension, and which is in turn destined to produce the necessary motor energy in order to bring to a conclusion the sexual act. The last part but one of this act is again a suitable excitation of an erogenous zone; i.e., the genital zone proper of the glans penis is excited by the object most fit for it, the mucous membrane of the vagina, and through the pleasure furnished by this excitation it now produces reflexly the motor energy which conveys to the surface the sexual substance. This last pleasure is highest in its intensity, and differs from the earliest ones in its mechanism. It is altogether produced through discharge, it is altogether gratification pleasure and the tension of the libido temporarily dies away with it.
It does not seem to me unjustified to fix by name the distinction in the nature of these pleasures, the one through the excitation of the erogenous zones, and the other through the discharge of the sexual substance. In contradistinction to the end-pleasure, or pleasure of gratification of sexual activity, we [can] properly designate the first as fore-pleasure. The fore-pleasure is then the same as that furnished by the infantile sexual impulse, though on a reduced scale; while the end-pleasure is new and is probably connected with determinations which first appear at puberty. The formula for the new function of the erogenous zones reads as follows: they are utilized for the purpose of making possible the production of the greater pleasure of gratification by means of the fore-pleasure which is gained from them as in infantile life.
I have recently been able to elucidate another example from a quite different realm of the psychic life, in which likewise a greater feeling of pleasure is achieved by means of a lesser feeling of pleasure which thereby acts as an alluring premium. We had there also the opportunity of entering more deeply into the nature of pleasure.[2]
Dangers of the Fore-pleasure.—However the connection of fore-pleasure with the infantile life is strengthened by the pathogenic rôle which may devolve upon it. In the mechanism through which the fore-pleasure is expressed there exists an obvious danger to the attainment of the normal sexual aim. This occurs if it happens that there is too much fore-pleasure and too little tension in any part of the preparatory sexual process. The motive power for the further continuation of the sexual process then escapes, the whole road becomes shortened, and the preparatory action in question takes the place of the normal sexual aim. Experience shows that such a hurtful condition is determined by the fact that the erogenous zone concerned or the corresponding partial impulse has already contributed an unusual amount of pleasure in infantile life. If other factors favoring fixation are added a compulsion readily results for the later life [which] prevents the fore-pleasure from arranging itself into a new combination. Indeed, the mechanism of many perversions is of such a nature; they merely represent a lingering at a preparatory act of the sexual process.
The failure of the function of the sexual mechanism through the fault of the fore-pleasure is generally avoided if the primacy of the genital zones has also already been sketched out in infantile life. The preparations of the second half of childhood (from the eighth year to puberty) really seem to favor this. During these years the genital zones behave almost as at the age of maturity; they are the seat of exciting sensations and of preparatory changes if any kind of pleasure is experienced through the gratification of other erogenous zones; although this effect remains aimless, i.e., it contributes nothing towards the continuation of the sexual process. Besides the pleasure of gratification a certain amount of sexual tension appears even in infancy, though it is less constant and less abundant. We can now understand also why in the discussion of the sources of sexuality we had a perfectly good reason for saying that the process in question acts as sexual gratification as well as sexual excitement. We note that on our way towards the truth we have at first enormously exaggerated the distinctions between the infantile and the mature sexual life, and we therefore supplement what has been said with a correction. The infantile manifestations of sexuality determine not only the deviations from the normal sexual life but also the normal formations of the same.
THE PROBLEM OF SEXUAL EXCITEMENT
It remains entirely unexplained whence the sexual tension comes which originates simultaneously with the gratification of erogenous zones and what is its nature. The obvious supposition that this tension originates in some way from the pleasure itself is not only improbable in itself but untenable, inasmuch as during [the] greatest pleasure which is connected with the voiding of sexual substance there is no production of tension but rather a removal of all tension. Hence, pleasure and sexual tension can be only indirectly connected.
The Rôle of the Sexual Substance.—Aside from the fact that only the discharge of the sexual substance can normally put an end to the sexual excitement, there are other essential facts which bring the sexual tension into relation with the sexual products. In a life of continence the sexual activity is wont to discharge the sexual substance at night during pleasurable dream hallucinations of a sexual act, this discharge coming at changing but not at entirely capricious intervals; and the following interpretation of this process—the nocturnal pollution—can hardly be rejected, viz., that the sexual tension which brings about a substitute for the sexual act by the short hallucinatory road is a function of the accumulated semen in the reservoirs for the sexual products. Experiences with the exhaustibility of the sexual mechanism speak for the same thing. Where there is no stock of semen it is not only impossible to accomplish the sexual act, but there is also a lack of excitability in the erogenous zones, the suitable excitation of which can evoke no pleasure. We thus discover incidentally that a certain amount of sexual tension is itself necessary for the excitability of the erogenous zones.
One would thus be forced to the assumption, which if I am not mistaken is quite generally adopted, that the accumulation of sexual substance produces and maintains the sexual tension. The pressure of these products on the walls of their receptacles acts as an excitant on the spinal center, the state of which is then perceived by the higher centers which then produce in consciousness the familiar feeling of tension. If the excitation of erogenous zones increases the sexual tension, it can only be due to the fact that the erogenous zones are connected with these centers by previously formed anatomical connections. They [increase] there the tone of the excitation, and with sufficient sexual tension they set in motion the sexual act, and with insufficient tension they merely stimulate a production of the sexual substance.