Most women who are blonde have constantly dyed/bleached their hair, so it's fried their brains. Kidding. But...it's possible.
I used to be blonde...but then I've been dark for over 8 years now...and will never go back...though I do have a blonde chunk in my bangs because I like the dramatic look...not because I want to have just 'some' fun.
I just think I look older with dark hair, plus I hated all the blonde jokes.