I have this one friend who is convinced that blondes are stupid - as in, the mere act of having blond hair growing out of your head means the person has a lower IQ. She truly believes this. So, my hair is light blond naturally, and in order to give myself some volume, I actually have it highlighted with bleach to damage it (yes, really) and then my colorist adds darker colors in. So to look at me, you might think my natural color is light brown, with blond highlights.
Anyway, after about 6 months of her making these comments that so-and-so can't be faulted for her dumb opinion on X because she's blond and just doesn't have the brain capacity to understand these things, I pointed out that I'm a natural blond. She looked at me and said, "Oh, I thought you went to the salon for your color." I replied, yes, my colorist makes my hair darker! She said, "But you're really smart. I'm so confused." I could only laugh at the whole situation (and to be fair, had kind of been laughing to myself for months ;). She still makes blond jokes all the time, which we both find very funny now.