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Most thorough pre-Masters masturbation study
A number of sexologists studied the effects of masturbation before the extensive programme
launched by Masters
and Johnson. One of the most thorough investigations of female response during masturbation
was conducted
by the American gynaecologist Dr. Robert Latou Dickinson whose findings were summarised
in his "Atlas of
Human Sex Anatomy" (first published in 1933). Dickinson explored theories about
vulval and clitoral
masturbation and was responsible for introducing, with Robie and LeMon Clarke, the
electrical vibrator or
massager into American gynaecological practice. Dickinson asked subjects to demonstrate
their masturbatory
techniques in order to correlate their methods with such factors as the degree of clitoral
excitation.