Mosts subs love a good gang bang..some need a coerced introduction but once they've tried like it most slutty subs they come back for more and more.
I've heard of subs getting "surprised" when entering a hotel room and getting gang banged by up to 40 guys which was organized over the net without her the sub being aware.
Anyway if they want to be a sub then well she needs to take the "full course" if she wants to graduate
BDSM is about perversion in many instances by mainstream society and there is a good reason for it in many instances.....I being into BDSM can freely admit this......and this is another way to justify many dom's perversion with gang bangs.
I have met many people in dens whom are into bdsm and quite frankly most of them are freaky, disturbed or just plain fucked up. I don't class myself with the rest as I can see the wood from the trees................but with the majority of these people i would never consider associating with them in any form or way