Let's post any erotica writer's resource links in this thread.
I didn't see these listed, so I thought I'd add them to the list. If I just missed them, then I appologize.
Anyway, here's some Victorian Sexual Slang for Steampunk, historical romance, or just fun.
This one, Victorian Slang Glossary is less about sex, than general slang, but there's a couple of gems in there.
I had another really great euphemism dictionary last night, but I can not find it again. If I do, I'll update.