Mini guide to writing BDSM

I have been asked to write a little guide to writing BDSM for the Primeval Denial Writers and Readers Club.  This is less of an instructional piece, but instead outlines some basics of BDSM that might be useful if you are considering writing BDSM at some point, and a couple of pointers to help along the way.

I thought I'd post here too in case anyone outside that fandom is at all interested in my thoughts on the matter as it's not fandom specific.

( All tied up under the cut... )