I appreciate the indepth description. I do think that all the basics are covered in that particular description............BUT............. I do think that describing our world such as it is. Is MUCH more complicated though. Each individual is different and each relationship[s] are so very different that we as a community can see that a definition is only that. A basic definition. The reality is so so much more intense. The many diferent concepts, roles and likes and dislikes of the "BDSM" community is so complicated that I really do not think that a dictionary really cannot fully explain the true concept of each individuals role.
We are who we are no more and no less. I also think that in every single "vanilla" relationship somewhere although usually hidden there lies a secret desire to try and do interesting sexual games.