I prefer the phychological aspects rather than physical. My Master leans towards pain but my Sir leans more towards the phychological part. Both work with me. I am a painslut so Sir prefers using the phychological domination rather than pain.

I do think that both combined helps as well. Sometimes, adding the pain with the phychological can prove the point even more.

With me can I have one without the other?

Not sure how to answer that. Both work well with me.

Which is more effective?
I think the phychological domination is more effective, that is with me.