Does anyone know why blonds are so famous for being dumb?!

Does anyone know why blonds are so famous for being dumb?

Is it not partly due to some people envying them for being prettier than most other girls?

2 weeks ago
I'm awfully sorry for unitentional insult to non-blond cuties!
I just meant to make up for a littl part of tons of insult agianst blondes.
Please accept my appolgies for the hurt feelings, any ways.

The myth started with Marilyn Monroe, or so I've been told.

She was hot, sexy, blonde, and as dumb as a doorknob.