Few years ago I woke up extremely horny. My wife had left for work so I thought I'd masturbate. I looked around the room for lube but there was none. But I did notice my used condom from the night before. I picked it up and could still smell my wife juices which made me all the harder. Then a crazy idea came into my head.
I took the rubber still filled with my prior night's cum and slid it over my cock. I made sure I rolled it up so the open end was on a dry spot and wouldn't slide off. I then got out of bed. I kneeled next to my bed and slid my cock between the mattress and the bed springs. The cum let me slide easily back and forth. But the mattress weight made it feel very tight. Next I was screwing the mattress. Every thrust forward sent a nice shock wave as the end of my cock hit the end of the rubber. Before long I was filling the rubber with more of my cum.
I did this four more times in the next hour. I did not know I could cum that often and that fast. It was so great a feeling it was addicting and I do it as often as I can. The only thing better is screwing my wife.
Word of warning: Use of the rubber several times will eventually cause it to break. Slide a towel over your cock then slide under the mattress. That way if it does break you don't leave cum spots.