The next time you spank your sub, remind them who they are in your life! Indeed, actions speak louder than words, but in this case, both send a clear message. How clear, you may ask? Let's just say you can read it on their bare skin.
This just leave a mark on your slave's body. With just a hit, you can have the word Slut imprinted on their hot, sensitive body—reminding them that they are your slut, and you are their Master!
So go ahead; spank your slave with this leather paddle. That will surely put your sub in the right place!