Something about being told what to do and being so slutty you do whatever it is. Like 3 inch wide plug, ball stretch cock ring, covered in oil and lay out naked in your yard even though people can see you.
Before I introduced my chastity kink to my Wife, I would send her sexy pics like the one on the left. After we then started chastity, she would prefer her pics more and more with me being locked in it. Can you guess why?
