I’ve basically come to the conclusion that while maximum glans size does vary, the ease of attaining, and maintaining this size comes down to the pressure on the CS.
It’s been said on here before that the CS is like a clowns baloon - push down on one end of it, and the other end will expand.
I think different penis’s tend to have a different ‘base’ or ‘default’ level of compression. Some will naturally have a CS which has a fair amount of pressure on it, allowing for very easy glans expansion, while others will not, and will have to wait until maxiumum erection to see a nice filled up head.
Whats interesting though is with me, the glans tend to fill up easily standing, but have more trouble lying down. Don’t know what to put that one to, but what I do know is that whatever position I’m in, all it takes is a bit of pressure on the CS and the glans fill up more.
I wonder if there is a way to somehow naturally increase the amount of pressure put on the CS…