My D (47M) and I (40f) have a free use agreement for some sexual acts. But we’re also beginning to incorporate (for lack of better term) free use pain play into our dynamic.

These instances aren’t as “hard” as our full impact scenes - but things like lifting my shirt and squeezing/twisting my breasts, bending me over to spank with a spatula, or biting different areas on my body. All done with no/little warning (besides perhaps a look in His eyes lol). So, more than a little pinch or booty slap - and the shock ups the intensity for me, so can easily go past my usual tolerance in a longer scene.

I’m sure there are others that do this - any advice on how to incorporate this into a free use dynamic? Any words of caution from experience? Also open to tips & techniques you have used - thank you!