Mouth-genital sexual relationship represents a fixation to an early fantasy of an ideal intercourse, representing a 'closed circle' with its sense of completion, perfection, security, endlessness. These concepts exist also in the fantasy that the mother not only suckles but also sucks from the child. We have here the prototype of combined activity and passivity, of both infantile and maternal orality. One also finds illustrations of the 'closed circle complex' in the equation of penis and clitoris with the nipple, in the conditioning experience of obtaining relief on