Note 319 — Chapter III · THE TRANSFORMATION OF THE LIBIDO. A POSSIBLE SOURCE OF PRIMITIVE HUMAN DISCOVERIES
Beatrice M. Hinkle translation
The driving motive for the breaking up of the ring might be sought, as I have already intimated in passing, in the fact that the secondary sexual activity (the transformed coitus) never is or would be adapted to bring about that natural satiety, as is the activity in its real place. With this first step towards transformation, the first step towards the characteristic dissatisfaction was also taken, which later drove man from discovery to discovery without allowing him ever to attain satiety. Thus it looks from the biological standpoint, which however is not the only one possible.