in she fell asleep, and
had another dream of sexual character, but resisted the tendency
to excitement, and again awoke; finally, she fell asleep and had
a third sexual dream, which was this time accompanied by the
orgasm. (This has recently been described also by Naecke, who
terms it _pollutio interrupta, Neurologisches Centralblatt_, Oct.
16, 1909; the corresponding voluntary process in the waking state
is described by Rohleder and termed _masturbatio interrupta,
Zeitschrift fuer Sexualwissenschaft_, Aug., 1908.) The factors
involved in the acquirement of vesical and sexual control during
sleep are the same, but the conditions are somewhat different.

There is a very intimate connection between the vesical and the
sexual spheres, as I have elsewhere pointed out (see e.g. in the
third volume of these _Studies_, "Analysis of the Sexual
Impulse"). This connection is psychic as well as organic. Both in
men and women, a full bladder tends to develop erotic dreams.
(See e.g. K.A. Scherner, _Das Leben des Traums_, 1861, pp. 187 et
seq.; Spitta also points out the connection between vesical and
erotic dreams, _Die Schlaf und Traumzustaende_, 2d ed., 1882, pp.
250 et seq.) Raymond and Janet state (_Les Obscessions_, vol. ii,
p. 135) that nocturnal incontinence of urine, accompanied by
dreams of urination, may be replaced at puberty by masturbation.
In the reverse direction, Freud believes (_Monatsschrift fuer
Psychiatrie_, Bd. XVIII, p. 433) that masturbation plays a large
part in causing the bed-wetting of children who have passed the
age when that usually ceases, and he even finds that children are
themselves aware of the connection.

The diagnostic value of sexual dreams, as an indication of the
sexual nature of the subject when awake, has been emphasized by
various writers. (E.g., Moll, _Die Kontraere Sexualempfindung_,
Ch. IX; Naecke, "Der Traum als feinstes Reagens fuer die Art des
sexuellen Empfindens," _Monatsschrift fuer Kriminalpsychologie_,
1905, p. 500.) Sexual dreams tend to reproduce, and even to
accentuate, those characteristics which make the strongest sexual
appeal to the subject when awake.

At the same time, this general statement has to be qualified,
more especially as regards inverted dreams. In the first place, a
young man, however normal, who is not famili