At the beginning of detumescence the features are frequently more
discomposed. There is a general expression of eager receptivity to sensory
impressions. The dilatation of the pupils, the expansion of the nostrils,
the tendency to salivation and to movements of the tongue, all go to make
up a picture which indicates an approaching gratification of sensory
desires; it is significant that in some animals there is at this moment
erection of the ears.[122] There is sometimes a tendency to utter broken
and meaningless words, and it is noted that sometimes women have called
out on their mothers.[123] The dilatation of the pupils produces
photophobia, and in the course of detumescence the eyes are frequently
closed from this cause. At the beginning of sexual excitement, Vaschide
and Vurpas have observed, tonicity of the eye-muscles seems to increase;
the elevators of the upper lids contract, so that the eyes look larger and
their mobility and brightness are heightened; with the increase of
muscular tonicity strabismus occurs, owing to the greater strength of the
muscles that carry the eyes inward.[124]
The facial expression which marks the culmination of tumescence,
and the approach of detumescence is that which is generally
expressive of joy.
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