All pain is subjective. One persons 8 is another persons 2. Also keep in mind that pain is only what you think it is. Forgive me for putting it this way, but it is the best example.

Some people like to get spanked as a normal part of their "Relations" and they find that enjoyable. While the same people while receiving the same spanking during any other time find it painful. Same thing for one person who enjoys it and another that finds it painful. It's all in the perception of the pain. It's all the same "pain" be "felt" but interpreted differently.

Rick