Contract signing

In fetish context, the very act of signing a “slave contract” or any formal agreement can be a turn-on. The sub might fetishize that piece of paper as much as any physical act. Even something like having a daily rules list pinned up (dress code, speech rules, etc.) can create a constant erotic charge if that’s what you’re into. It’s more about mental dominance. (Make sure it stays in roleplay realm and doesn’t slip into anything non-consensual controlling in real life beyond what’s agreed.)