Group of gay men in New York dedicated to safe, sane and consensual S/M.
More on s&m on urban dictionary.
SM and the law.
Sadism and masochism explained and discussed in more detail on wikipedia - free encyclopedia.
A social and sexual fraternity for gay men over 21 years of age, into S/M and the oldest continuous gay male S/M club in the western USA
A comprehensive list of upcoming BDSM, Fetish and Leather Events. The most complete list of BDSM, Fetish and Leather organizations and munches on the net.