I have read about this rubber band and how it can harm you and have become concerned about what I do.
The room where my computer is, is next door to the bath room. When I masterbait I need porn or a really good moment. As most people have, I got porn on my computer so I wank at my computer. When I 'cum', I firmly put my hand around my penis about half way up to stop the cum going every where, then I may sit here for a minute or two to watch the end of the movie or run to the bathroom to let it all out.
Is it dangerous stopping the cum like that and either holding it for a while or holding it for a few seconds?