Questions answered

The first question that I had was what is the difference between a sub and a slave well two friends answered me. They are a Domme and a submissive. The sub said that a slave was a high form of a sub one that obeyed their dominantm at all times. The Domme said it simply you cannot say no to any order or command?

I guess that with my agreement to those statements I would add that there is not a safeword needed since the slave cannot refuse any command would there? You totally give all the trust you possibly can to the Dominant.

Drakor