Yes. You will regret asking.

To put it simply, a redditor repeatedly jerked off into (IIRC) a shoebox for an extended period. The same box, no disposal or cleanup of any sort. He made a casual reference to this box and was surprised when others couldn’t relate. He posted pictures.

I never saw the pictures and I don’t intend to, so if you are interested to learn more, you’ll have to do your own searches.