How does one....

How does one physically punish a pain slut? This is a question DOminants have been asking for years. For me, personally, my mind can separate the different sensations of the intended punishment.
For example, if Master were to decide that I deserve to be whipped for a transgression, and decides to use a belt to give me a strapping, I would interpret that as a punishment because I know the intent. If Master were to say that I have behaved and deserve a strapping, my mind would interpret that as pleasure. My mind knows the difference.
I know how this sounds and it is something that has confused Dominants ever since I started in the scene. It is something about me. I don't really know how to explain it.