| http://www.w3.org/ns/prov#value | - Phosphodiesterase type V enzyme has been found in human clitoral cavernosal smooth muscle, which degrades cyclic guanosine monophosphate (cGMP) .Inhibition of this substance might result in relaxation of clitoral and vaginal smooth muscle and improve arousal .Other factors and hormones such as oxytocin and endorphins act on the brain to promote sexuality.
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