most frequently
obtrude themselves, and I believe that if it were possible to
induce people to relate their dreams they would very often be
found to be of a sexual character."

Much more important than the general motor phenomena, more purposive
though involuntary, are the specifically sexual muscular movements. From
the very beginning of detumescence, indeed, muscular activity makes itself
felt, and the peripheral muscles of sex act, according to Kobelt's
expression, as a peripheral sexual heart. In the male these movements are
fairly obvious and fairly simple. It is required that the semen should be
expressed from the vesiculae seminales, propelled along the urethra, in
combination with the prostatic fluid which is equally essential, and
finally ejected with a certain amount of force from the urethral orifice.
Under the influence of the stimulation furnished by the contact and
friction of the vagina, this process is effectively carried out, mainly by
the rhythmic contractions of the bulbo-cavernosus muscle, and the semen is
emitted in a jet which may be ejaculated to a distance varying from a few
centimeters to a meter or more.

With regard to the details of the psychic sides of this process a
correspondent, a psychologist, writes as follows:--

"I have never noticed in my reading any attempt to analyze the
sensations which accompany the orgasm, and, as I have made a good
many attempts to make such an analysis myself, I will append the
results on the chance that they may be of some value. I have
checked my results so far as possible by comparing them with the
experience of such of my friends as had coitus frequently and
were willing to tell me as much as they could of the psychology
of the process.

"The first fact that I hit upon was the importance of pressure.
As one of my informants picturesquely phrases it--'the tighter
the fit the greater the pleasure.' This agrees, too, with their
unanimous testimony that the pleasurable sensations were much
greater when the orgasm occurred simultaneously in the man and
woman. Their analysis seldom went further than this, but a few
remarked that the distinctive sensations accompanying the orgasm
seem to begin near the root of the penis or in the testes, and
that they are qualitatively different from the tickling
sensations which precede them.

"These tickling sensations are caus