Being mainly a Domme, more on the sadist side, I have to say that I enjoy causing people pain; it gives me this cheeky little smile and rush to do it - whether someone wanted me too or not However, when doing that in a relationship I would need to know that the other person also enjoys being caused pain, it increases my pleasure from it and stops me from feeling guilty (slightly selfish reason, but I'm not totally evil!) It's great to do things which you have both discussed and to hear them moan as you whip them or push them further, but it's also a great releif to know that if you do go too far that they are able to tell you to cool down or stop if you have gone too far. Sometimes the fact that they haven't told you to calm down or stop can push you further as well and everyone developes in the relationship.

As a switch I also like to be whipped or beaten on occasion and if this was been done by someone just because I asked them too and they got no pleasure from it (my Domme side apart, since it is another form of domination making someone do something there not totally comfortable with and pushing their limits) I would end up feeling guilty. However if someome was beating me solely because they got off on it and didn't really notice whether I was or not, firstly I don't think Iwould feel very safe and would avoid that kind of situation and secondly I would feel completely used.

OK not sure if that was of any use or made sense, but I hope my opinions helped a little bit!