Only when they are edging they aren't allowed hehe but otherwise there is no limits. Good point. Not allowing someone to cum would make them the cuck.
Discussion
Friends don't let friends not cum, at some point there's gonna be a release. Whether its delayed that's their kink
When the guys not release and edge for a while they are able to produce huge loads. Like impressive amounts. Not letting them is part of the game as oppose to a way of diminishing their participation.
Well if you're gonna blow a load best to make it a big one. Your partner might be offended otherwise after all that work they did
ngl, he loves it when the loads are huge. I'm very petite so it makes the mess look even larger.