The "Cock Lock" Male Chastity Devise

My wife & I like to play with extended foreplay. I'm not submissive, but enjoy the build-up to a massive climax. This seemed to be a good design, but fit is a major problem. The design permits only four sizes (and I can't imagine anyone being small enough to use the smallest size without physical damage.) If the size is too large, the device slips and rubs. Too small and numbness sets in after 24 hours or so. Wrapping in gauze helped fine-tune the size somewhat and made it more comfortable to wear, but when it was removed after a few days I discovered a lot of bruising and abrasions from pressure points -- I was very tender for a week after.Use this one only for short periods!