Consent. Consent gives you all the power in the situation. Sometimes you just want to turn your mind off and be used for sexual pleasure by the person you trust. Sometimes it’s about giving them that crate Blanche to take whatever they want. I’ve never been SAd but I think it would probably be quite therapeutic and a way to take back your power by being in a forced situation where you can actually say stop and everything will stop. Some ppl dread the loss of control and need to find their way back to being ok with it and some ppl just straight up love it. It’s like every sexual preference, totally subjective. It’s super complex with so many variables to explore. I think it’s the caveman in us all and it ends up expressed different ways.