Nina Hartley is a true MILF but she's been young one time too :) She started dancing as young teen in 1983 which she says was a fun way of making money and meeting other bisexual woman. And yes, Nina is bisexual.
She har written a book called "Nina Hartley's Guide to Total Sex". We here at YPLf havn't read it but sources say that it is a really good book were Nina shares lots of her secrets on how to be a great lover with confidence and competence. She used to write many articles in magazines, but all that information is now stored in one book, thanks for that Nina! :)