Cindy

“As adults, we have many inhibitions against crying. We feel it is an expression of weakness, or femininity or of childishness. The person who is afraid to cry is afraid of pleasure. This is because the person who is afraid to cry holds himself together rigidly so that he won't cry; that is, the rigid person is as afraid of pleasure as he is afraid to cry. In a situation of pleasure he will become anxious. As his tensions relax he will begin to tremble and shake, and he will attempt to control this trembling so as not to break down in tears. His anxiety is nothing more than the conflict between his desire to let go and his fear of letting go. This conflict will arise whenever the pleasure is strong enough to threaten his rigidity.
Since rigidity develops as a means to block out painful sensations, the release of rigidity or the restoration of the natural motility of the body will bring these painful sensations to the fore. Somewhere in his unconscious the neurotic individual is aware that pleasure can evoke the repressed ghosts of the past. It could be that such a situation is responsible for the adage "No pleasure without pain.”
― Alexander Lowen, The Voice of the Body