You're there...helpless & restrained in her fave position as she teases you towards what you know will be an explosive release. Yeah..she smacks your ass and turns it into a bright red globe but is that enough to make this a true BDSM-type session? Is the No pain...no gain" credo applicable here?
How about some marks on your chest from hot wax?
A couple of lash marks spanning your back?
Can you picture the indentations in your nipples from those alligator clamps?
Would you refrain from true pain if it's "incovenient" or impossible to hide from someone else?
Will BDSM-light do the trick?