Fetish and kink fascinate me endlessly, and while there is a vast ocean of books and knowledge out there about kink from this century, I'm now more interested in the ancient history of kink. I'm talking the 17th century and backwards. If you know of any books about this I'd be so grateful if you gave me the title.

The human psyche is as intricate as it is crafty, and I'm sure kink has played a part of history as long as there has been a desire for sexual relationships. How did ancient civilizations or even more "modern" societies deal with this phenomenon? I assume most of our sexual history is blanketed by strict religion and societal rules and norms but has this always been the case? Has there ever been a place in time where sexuality and then kink didn't have to stay secret?

Has fetish/kink essentially been divided by class until later times? I assume aristocracy in all parts of the world would have more resources and time to explore themselves and others, plus have an easier time dodging the religious rules of the common folk?

Another question: (and forgive me if this is obvious or stupid) have kinks and fetishes closely followed societal trends and taboos throughout history? As an example, would foot/ankle worship be statistically more significant in an era where showing some ankle would be seen as scandalous? Is there any written evidence of fetishes that are now lost to time?

Thank you for your time!