"Rhythm is deeply impressed on our organism, whatever lends itself to the neuro-muscular rhythmical tendency of the organism exerts upon us a stimulating effect. Music is a powerful stimulant to muscular action. The Swedish philologist Sperber argues that sexuality is probably the first source of speech. And must have occurred early in vertebrate development. Vaschide and Vurpas have pointed out that even in the absence of specific localized sexual effects, the physiological effects of music resemble those of sexual excitement." Havelock Ellis. Psychology of Sex.