BDSM babe tied up for finger banging punishment

It means, "Hey, I need to talk to you, so I'm going to say red so we can stop."

Or it's a way for you to say, "Hey, yellow, stop hitting me in that same spot over and

over.

I need you to find another spot."

So it's a way for us to communicate and have a good, fun, consensual time, not so much