I had almost forgotten I used to jack off into condoms and freeze them, having gotten the idea from a guy who sold his cum on eBay. This was in 2003. He said he froze his, but then he had to send them through the mail, so I emailed him to see what happens as they melt. He didn't know, but there were all these cum pigs talking about his 'tasty cum'. He threatened them with all sorts of legal action, and that probably turned them on into being total submissives that he couldn't have cared less whether they lived or died. His moniker was 'misunderstood.' Retarded idiot.
I would not countenance any saved cum that was not frozen and then taken out and used (all of it) at a single time. I used it as a kind of pagan ritual and would rub it on my basket and ass when I played concerts, or sometimes I would use it jack off with. I think that guy is still selling cum on eBay, he must be out of his mind. I only did that for a couple of months, but the idea of old cum that was not immediately refrigerated for use later is totally gross to me. It's bound to decay in every way.