The tag implication #42359 sex_dungeon -> bdsm has been rejected.

Reason: A sex dungeon is often set up for BDSM sexual pleasure and feature various BDSM equipment, such as bondage gear, wrips, gags, etc.
Also, many of the posts with the sex_dungeon tag already have a bdsm tag, so why not implicate it just in case?

EDIT: The tag implication sex_dungeon -> bdsm (forum #320383) has been rejected by @bitWolfy.

From what I got from the BDSM wiki, this tag refers to characters practicing/doing it. And it's possible to have a post with that features a sex_dungeon and there's zero_pictured or the characters aren't actively doing bdsm.

The tag implication sex_dungeon -> bdsm (forum #320383) has been rejected by @bitWolfy.