i think the pain slut in question has had one type of experience and enjoyed it alot.. therefore it must be the whole world. really. *smile*
i think it would require a purely S&M perspective to confuse an endorphin high with the mental and emotional state of bliss some people call 'subspace'. one takes pain and trauma and the other takes... no touch at all necessarily.
id just pat them on the head and pay them no mind if it were me.