What is the specific theme being expressed in the play "Pygmalion"?

At the risk of
sounding like Bill Clinton, what specifically do you mean by the word "specific"? (If
you're too young to get that joke, check out the link below.)

Unless our name
is , we can only attempt to say what is the theme of "."
 

In my humble opinion, there are two main themes in
"Pygmalion."

a) Distinctions of class (upper class,
lower...