Before the tumblrverse and sex and submission, when it was still illegal to show penetration in bondage, young pervs like me had to rely on usenet to find kink. (alt.binaries.pictures.erotica.bondage, anyone?) Anyway, this series reminds me of what I found most often - grainy black and white, simple ropework, lots of cloth gags and hogties.
Does anyone else here remember the CKBD series?