Check out these bibliography titles -- they're lists of erotic books compiled by the Victorian collector Henry Spencer Ashbee:
Index librorum prohibitorum: An Index of Forbidden Books (1877)
Centuria librorum absconditum: A Hundred Books Deserving to Be Hidden (1879)
Catena librorum tacendorum: A Chain of Books Which Should Not Be Spoken Of (1885)
As usual, the forbidden sounds quite delicious. If some publisher wants to start a line called, "A Hundred Books Deserving to Be Hidden," I think I will buy a subscription to the whole series. It makes me want to read every single one.
Hat tip to Geoff Nicholson's Sex Collectors, which is my current ongoing source of interesting sexual errata.