The medium bipolar plug is a wonderful toy. Set at the right intensity it can be extremely painful, but is also absolutely wonderful feeling at other settings.
I cleaned my ass out and put plenty of electro gel Eshock in my ass. I put the large plug in my ass for a good, almost full feeling. I put it on high and turn on the vibrator and get my sex machine turned on for my masterbation session. My wife massages my balls as I lay back and let the electrosex plug and the sex machine work me over, real good. The next day when I wake up a little sore in front and back I am ready for us to go again.