I have forgone and even denied the use of safe words in certain situations. I can remember a few sessions where I announced to the sub that no safe word was available to him and that he was going to have to take what I dished out that day. In one scenario the sub was being punished for some infraction - that got his attention. In another I wanted to push a subs limits - and I did. Those sessions were exhilarating for Me because I knew it was exciting for the sub. Their fear/excitement was palpable and it fed us both.

These sessions require a "sane" Domme that knows when enough is really enough.