Humiliation

I have looked through the threads on the Submissive's couch, and Q&A for submissive's but I cannot find this question being asked before, but if it is somewhere other than those two places then I apologise for duplicating.

I asked this question last night in chat, but I think after everyone tried to answer, it was found to be a little too involving and complicated for a quick answer. Where do you as a submissive draw the line at public or private humiliation, either in game inside or outside the home? Actual or verbal what would you not do under any circumstances, think extreme. Bearing in mind that private humiliation in my question involves one other person to be present, and they could be either male or female. The question may be answered in part or in full.

Regards ian 2411