But in ordinary life natural development without disturbance is rarely or never met with. Hence the sexual activities take an entirely different course. Boys and girls are brought up promiscuously in flats, in schools or on the streets. The first component of the sex-instinct, the impulse of contrectation, has an early opportunity to develop, even before puberty, as may be seen in the early attachment of children. By the time puberty is reached this impulse has been completely developed. The opportunity for the gratification of this impulse is everywhere present. Hence the tumescence is not evoked by internal messages and natural promptings but through the actual contact. With the beginning of the contact, be it in thought, look, word, or touch, simultaneously also begins the sex-act. Having begun the act it is natural and normal for the lovers to have it completed. If the stimulation of the erogenous zones is prolonged beyond a reasonable space of time without relaxation by an emission, a sense of incompleteness and dissatisfaction will ensue. By some strange quirk of the human mind the error and fallacy have been fixed, even among thinkers, that sex-activity begins and ends with copulation.[V] The charging of the body with the necessary energy is considered a negligible quantity. We have taken out the final part of the act and elevated it to a fetich, in law as well as in sentiment, and consider all other sex activities as of no consequence. Yet the stimuli received through the other senses, causing the libidinous turgescence of the body, are the main part of the sexual chain of activities. The sexual act begins with the amorous caress, be it a caress in thought, look, or touch, as hugging or kissing. For contrectation or tumescence and detumescence represent only one act. One impulse is the sequel of the other. The Sermon on the Mount, preaching, “Whosoever looketh on a woman to lust after her has committed adultery with her already in his heart” (Matthew v, 28), is nearer the physiological truth than the common accepted view.