According to Mises (1951 [1922], 87, 104, n1), ‘Waking and dreaming, man’s wishes turn upon sex.’ His fiancée (1976, 28, 23) recalled:

Sometimes I did not see him for weeks. But I knew very well that he was in town. At least twice daily the telephone rang, and when I answered there was silence at the other end of the line — not a word was spoken. I knew it was Lu … I was so tormented, so torn to pieces that the children must have felt it.

Mises also gratified himself by feeling Margit’s six‐year‐old daughter: ‘I wanted to touch Gitta’s hair and think of you.’

(Emphasis added.)