There are so many blonde jokes. At first I thought those are jokes. But there are so many of them, I thought I should actually check things out. I ended up reading up on the net trying to verify. There isn’t a lot of effort trying to deny it. There is no scientific evidence supporting it either.
For comparison, there are tons of debates, enough to kick Kanazawa out of his famous blog, when he said that black girls are less attractive. Curiously, black people have 15 points lower IQ than whites. Yet I do not see many dumb black jokes.