Stoplight safe words are a set of safe words that are popular due largely to their clarity and brevity. They aren't just used to end a scene. Rather, they are used to communicate throughout the scene. Stoplight safe words give submissives a universally understood set of signals for staying on the same page as their dominant.
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More About Stoplight Safe Words
The stoplight safe word system works as follows:
Red indicates that the scene needs to be stopped and the sub released from any restraints. Yellow indicates that what is happening is testing the sub's tolerance and they may be near their edge. Green indicates that the scene is being enjoyed by the sub and should be continued.
