A quick warning about the use of safe words is simple they frequently don't work.

I am not implying that the Dom ignores them, because if he does he is not a Dom but an abuser, but that the submissive is no longer feeling any pain. This can be very dangerous to the submissive if she isn't being watched carefully by a skilled Dominant. Nothing will replace an aware Dominant being sure she is safe and not beyond a point that tomorrow will be very unpleasant to her.

I say this because I love putting her in positions that are at least uncomfortable and then seeing how many climaxes I can bring her too while she is like that and how much pain can be converted into pleasure. I have gone beyond once or twice with the belief that she will use her safeword and that never happened and yes the next day to week she paid the price for my belief in that.