I've abandoned some threads for this very reason.
I'm sad to say that this is true of people in general, not just the subsection on this site. Feeling strong is very rewarding, especially to those who usually feel weak, and being a part of a group standing against "the others" is an easy way to feel comparatively strong. The human species still hasn't learned those lessons of WWII.
On the other hand, quite often, a few good people who are just there can make all the difference. Like most of those on this thread. I follow year example, Aseratrix, in extending my solidarity to all whose differences are used against them.
okay, some of my turn ons... for me these two belong to different aspects within BDSM.
Orgasm denial is an act of dominance, a subsection of orgasm control, on the DS aspect. The dominant takes something the submissive desires away, as part of the exchange of power between them. Of course, it is usually emphasized by teasing the submissive and by bringing them close to orgasm, as this increases the desirability of the orgasm for the sub.
Chastity is an act of discipline, on the BD aspect. The submissive has given up their rights to orgasm via stimulation of their genitals. This may be at the urging of the dominant, or at the initiative of the submissive. This may be assisted by bondage into a physical device, and the power to resume those rights may be given to the dominant (possibly as a key to the device), or it may be enforced by the sheer willpower of the sub. This may be an act of penance, of devotion, of how the physical urges stand between the submissive and their desires. Monks who take a vow of celibacy aim to be chaste.
The third aspect, SM, specifically when the submissive is male, would obviously be CBT.
Now, when a Domme binds her willing victim, removes the cage from his member, edges him repeatedly while using him for her own orgasms, ruins his orgasm, places his balls in a set of Kali's Teeth and his cock in a vice... excuse me, I seem to have lost my train of thought, and should probably clean up, but I think you get the picture