As regards his sexual development, he remembers
that he was sixteen years of age when he first experienced sexual
sensations. Before this time he had been told by other boys about sexual
intercourse, masturbation, and many other things. He had, however,
never masturbated, though he had once or twice attempted to do so. One
day, when he was in the Upper Second Class, a mathematical problem was
given out, and as he found a difficulty in solving it, he became
anxious, all the more because his chances of promotion to a higher class
were largely dependent on his success. When he had barely finished half
the necessary calculations, the master announced that there were only
ten minutes left, at the end of which time the exercise books would be
collected. Thereupon his anxiety became extreme, and simultaneously he
experienced his first seminal emission. He is unable to give a more
detailed description of what occurred, and does not remember having had
an erection; but, as he expresses it, the sensation was extremely
pleasant. Subsequently, when in the First Class, the same experience
recurred several times, that is to say, he had a seminal emission as a
result of a similar feeling of anxiety. In other respects his sexual
development was normal. Seminal dreams were accompanied by the idea of
contact with a woman. On one occasion, however, he had a seminal
emission during the night in association with a feeling of anxiety. He
dreamed that he was being pursued by a mad dog, when suddenly he became,
as it were, paralysed and unable to run a single step further. The
consequent acute anxiety culminated in emission.

During sleep, sexually mature men and many sexually mature women have
from time to time involuntary sexual orgasms;[42] these occur chiefly in
persons without opportunities for sexual intercourse, who do not
practise masturbation. In such involuntary orgasms the male ejaculates
semen, the female indifferent glandular secretions. As a rule, the
ejaculation is accompanied not merely by a voluptuous sensation, but
also by a psychical process corresponding with the mode of sexual
sensibility of the person concerned. A normal man during the orgasm
dreams that he is embracing a woman; a normal woman that she is
embracing a man; a homosexual man dreams of the embraces of another man.
The dream-ejaculation is distinguished from the waking act of
intercourse to this extent, that in the former the ejaculation usually
takes place