This section is from the book "Human Sexuality", by J. Richardson Parke. Also available from Amazon: Human Sexuality.
Physical examination of the alleged culprit should include, of course, that of the genitals. This is of especial diagnostic value; since anomalies of these parts lead quite frequently to the gravest sexual disorders; either directly, through interference with function, or indirectly, through the mental condition which is superinduced by a constant brooding upon them. The most frequent of these malformations are: atrophy of the testicles, phimosis, or paraphimosis, stunted or deformed penis, fissures of the urethra, coalescence of the penis and scrotum, hypertrophy of the glans, penis or clitoris, and closure of the vagina. I have in mind an impotent male patient, who, unable to respond to the weaker stimulus of adult intercourse, has frequently confided to me his "belief" that he would be perfectly potent with a little girl. These men become violators, and are types of a somewhat large class in whom minor sexual offences represent but individual oscillations within the sphere of normality. They are criminals by occasion; made so through levity, sexual passion, idleness, unfavorable surroundings, and, as von Holder Bays, more than all through abuse of alcohol.1
 
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