Many years ago, I would get a condom, slip it on, and manipulate my cock until the inside of the condom was fairly well lubricated by my 'pre-cum.' Then I would finish jacking off and ejaculate into the condom.
It finally dawned on me that I was wasting a lot of time-and sometimes making my penis sore-trying to get the condom lubricated enough with my pre-cum to feel good, so I hit on an idea. I brought myself off in the condom and instead of flushing it down the toilet, I rolled it up from the open end down so that my semen didn't leak out of it, put it in a 35mm film cannister-they had screw-on caps in those days and could be made airtight-and saved it for my next jack-off session.
The next time I masturbated, I would take the condom out of the cannister, unroll it, and slip in on my cock. My old semen worked just great as a lubricant, and I would keep using the condom and my ejaculated semen that way until it got so full of my cum that it was leaking out around my cock.
At that point, I would slip the condom on, work it around on my cock to get it covered with my cum, then pull the old condom off and slip a new one into place.
It was really kind of cool, using my own cum as a lubricant!