These are some resource links that can be useful should anyone decide to write BDSM or anything along those lines. For those that don't know BDSM stands for Bondage, Discipline, Dominance, Submission, Sadism, Masochism.
[mature content]General Resources: Kink Bingo community has compiled a list of general resources. This has everything from essays on different kinks, disabilities and kinks, as well as music playlists to which to write particular BDSM scenes. Lots of interesting and important information here!
Kink Wiki: A wiki for kinks, where each entry is a separate kink. Just look on the side for the particular kink that you want to know.
Kink Bingo: A bingo challenge that runs for a year.
On BDSM: A discussion of BDSM by someone that is in the BDSM community.
Kink Resource Directory: This has some great links in multiple languages on topics of kink including BDSM. As well as essays, nonfiction books and even fiction that was published on the topic.
BDSM?: Information on toys, techniques and roleplaying scenarios. There are also information on safety, links to other sites, and much more.
How I write BDSM: An essay on how one author writes BDSM fiction.
Within Reality: Website that has some great essays on BDSM and lifestyle.