I hope this is okay for me to send through. It's some thots about sub Spencer!
To start off I don't think Spencer has a knife kink, but he sort of likes the idea of it. Just take the risk and pain aspect of it away.
So bring in resin knives. Those pretty floral ones with the flowers and they're just so pretty. The thought of his SO in pretty lacy lingerie blindfolding him and running the dull object along, changing the pressure as it moves along his skin. Lips sometimes replacing it and the anticipation of whether lips, hands or the dull blade will be against his skin
So sorry I took a long time to answer! This is perfectly fine, and I absolutely love to hear them π₯°
I think you're spot on that Spencer would love the idea of a situation like that. Also, the sensory experience could be so different if you chill or warm the resin. Even just knowing that he's come to trust someone enough to do something like that probably makes him so emotional, which just makes everything even more impactful!