As an 'ee I have never used a safe word. In the beginning: "Name, I think I have had enough." Has been enough. Of course when I made the statement a bit of conversation ensues which has ended it right there or ends with a negotiated addition. After some experience 'toughening up' the end of a spanking usually occurs when my bottom begins to show damage. "I have kept the same 'er for that reason and restrict myself in the same way when I top..