My new e-stim set came with a conductive rubber urethral sound... but obviously it was a much better fit for my cervix. This clip starts after I had done some initial testing, so the power is at 40% when the video begins, and then I turned it up higher and higher! It felt for all the world like something was sliding in and out, fucking my uterus, and you'll hear my moans change as I become nearly delirious with arousal.