When your partner first promised they would let you orgasm while you were caged, you figured a vibrator would be used or you'd be let out of the cage, however, when they strapped on a dildo and smiled, you knew you were never gonna cum normally again.
Your mistress revealed to you months ago you would no longer be allowed to cum with your hands. It took some time, but you finally learned how to cum from her sharp spanks and heavy touch.