Where did the phrase "dumb blonde" come from?

Question

I'm not blonde I just wanted to know

Answer 1

"The 1925 Anita Loos novel "Gentlemen Prefer Blondes: The Illuminating Diary of a Professional Lady" (later used as source for a film by the same name starring Marilyn Monroe) featured the character Lorelei Lee, a beautiful but empty-headed singer. While some look to this as the source for the concept, in fact, it might be far older."

"Puritans, associating makeup and dyeing of hair with prostitution, forbade the dyeing or bleaching of hair, creating an imprint on dyeing hair that lasted until the 1920s. The "dumb" side could have been a way for wives of adulterous men to reassure themselves about the infidelity of their husbands; to think that their husband's blonde mistress was sleazy, worthless, ditzy, and not very intelligent. Or, the idea might stem from the idea amongst Romans and Greeks that Northern Europeans were barbarians and thus less advanced than Southern Europeans."

"Dumb blonde", Wikipedia : http://en.wikipedia.org/wiki/Dumb_blonde