@Draconess25 thank you for telling me.
I agree with what dpworkin says about masochism being a normative sexual choice.
It also might be worth exploring the inability to feel with a therapist and physician. Sometimes the inability to feel physical pain can mean something is amiss such as this: http://en.wikipedia.org/wiki/Congenital_insensitivity_to_pain. While this is rare it never hurts to understand ourselves better.
I mention a therapist because, sometimes, the inability to feel physically is also reflected in our inability to feel emotions. Also, in some cases, physical pain becomes the only possible way for one to feel anything. (I don’t assume this is the case for you or this is even something negative.) A good therapist is skilled at helping one explore whether certain things about us are problematic, disordered, or simply a way, of being, that we find comfortable.