Pain in ass

I have make a little présentation on video. I time the insertion of one of my big dildo balldeep. The time will give the number of hit to my balls balls with a tenis ball in a sock. But with a little twist. It's not 1 second 1 hit. It's 1 minute = 100 hits and every second left is 1 hit more. So, you have 40 more hit every new minute! Like you willl see, it encourage me every time closer to the end of a minute. Thanks