AU fics where B or J (or both) are already involved in BDSM when they meet

[turtlegirl922.livejournal.com]

Whew...that is a long subject line!

Anyways, like the subject line says, I'm looking for stories where either Brian or Justin (or both) are already involved in BDSM when they meet. I like the idea of one or both of them being more experienced in the lifestyle. Also, it doesn't really matter to me who is the Dom and who is the sub. I guess I'm thinking of something similar to elyxer's "Leather Bound" which I have read multiple times (the sequel "Collar Bound" is fantastic as well).

I've checked the tags and memories and have read many of the stories that are mentioned, but am hoping that you guys know of some other fics as well.

Thanks in advance...

EDIT: Have recieved a couple of recs (see links below)...Would love to hear of more fics though...keep 'em coming.

Edit #2: If you can't use the provided link for Black Heaven, please PM me and I will email it to you. Please, no more posts requesting that someone email it to you...

Black Heaven:
http://web.archive.org/web/20040805203624/midnight-whispers.com/lizzy/blackheaven/blackheavenindex.htm

Thou Art to Me a Delicious Torment:
http://community.livejournal.com/bjfic/2262888.html