Now, it's extremely interesting to me that you bring up Dianne Moore, since she's on my list of suspected non-bleached (i.e., TRUE) blonds. No doubt sometimes she looks blonder in certain lighting, but the head hair and pubic hair always seem to match. Still, I could be wrong.
She's a spectacularly beautiful woman, though, isn't she?
And that very first picture is one of my all-time favorite poses in porn. Wow!