During periods
of great sexual excitement the nerves of the urethra and corona
seem to possess a peculiar sensitivity and are powerfully
stimulated by the violent peristaltic contractions of the muscles
in the urethral walls during ejaculation. It seems possible that
the intensity and volume of sensation felt at the glans may be
due in part to the greater area of sensitive surface presented in
the fossa as well as to the sensitivity of the corona, and in
part to the fact that during the orgasm the glans is more highly
congested than at any other time, and the nerve endings thus
subjected to additional pressure.
"If the foregoing statements are true, it is easy to see why the
pleasure of the man is much increased when the orgasm occurs at
the same time in his partner and himself, for the contractions of
the vagina upon the penis would increase the stimulation of all
the nerve endings in that organ for which a mechanical stimulus
is adequate, and the prominence of the corpus spongiosum and
corona would ensure them the greatest stimulation. It seems not
improbable that the specific sensation of orgasm rises from the
stimulation of the peculiar form of nerve end-bulbs which Krause
found in the corpus spongiosum and in the glans.
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