Let's be honest here -- this show isn't exactly one to delve into things with great detail, or even any detail in many cases. Every episode is like 3 minutes of mythology and 40 minutes of poorly written nonsense with the "trouble of the week."
Seeing as how Nathan gives and takes in fights just like any other person, I just assume he can feel and apply pressure just like anyone else, just no sensation of feeling other than with Audrey.