This big 36" gold balloon is super squishy and resilient, and takes so much of me bouncing and grinding on it. After filling it most of the way on my electric balloon pump, leaving enough room in it for it to be nice and squishy, I clip it off and get on top of it and hump it. I get really close to cumming as a small hole tears in the balloon, but I hold enough air in it to cum on the balloon and tie it afterwards, sealing the hole. But, the balloon doesn't last much longer after that...