I'm pleased that my first post has stimulated a mass debate on the forum.
With regard to why women might be prescribed Viagra, WebMD has this to say:
"Roughly 42% of the women taking Viagra reported increased satisfaction during (Redacted) and (Redacted), compared with 28% of women taking the placebo.
Likewise, 57% of the Viagra-treated women reported improved (Redacted) in the (Redacted) area during (Redacted), compared with 44% of women taking the placebo"