Just received my newest toy,the all metal cock-lock and damm that thing is heavy and large.I bought the 2” ring opening as all the reviews said it would be easier to put on and take off. As soon as I opened the box I wanted to try it out..First you slide your cock through the opening then pull your balls through. Once that is done lube up the ball end and insert into the butt-hole. This will pull your cock and balls down some and cause the ball end to touch the prostate.All motion from the front is transmitted to the prostate giving some nice feelings and lots of pre-cum.My plans are to try regular sex with it in place then electrify for use with E-stim. I did buy two in case I wanted it both ways.More reports later.