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I have developed a hands off JO machine. It consists of a sewing machine motor and speed controller, 2 stages of gear reduction driving an eccentric crank linked to a 2" dia. air cylinder. A tee is added to the air cylinder, one side is for vacuum application, the other connected to your favorite pump cylinder. After insertion of your lubed penis in the cylinder, draw a vacuum and turn on the motor via the speed controller. I maintain a vacuum between 1"hg to 20"hg during cylinder stroke. It is best to begin with your penis packed in the tube.
As an enhancement to the above, I have added a "teeter totter" to a floor joist above. This consists of a PVC pipe hinged in the middle, one end weighted and the other, a cord attached to the pump cylinder. I make my own cylinders from acrylic tubing. A hook added to the acrylic end cap competes the design.
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I also use tights the same way and I also do it in the shower
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Grab mom's or sis's leather purse while they are asleep. It is amazing to straddle the purse, or jerk off with it. You can put a beach ball inside it, inflate it, zip it up most of the way, and then ride it. You will hump it until you shoot a load on the purse! Just make sure you clean up your mess. Get it ready for another night, so you can boink the purse again and again!
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