So today my dick still felt rubbery, but it also felt like my dick was understimulated and I was starting to lose some of my gains. So I decided to start a light workout. My dick seemed unresponsive, so I decided to do something a little more intense. The response I found was a good one. I ended up doing some clamping. My dick never looked bigger.
After the workout, I edged and came, which normally leads to some turtling. I had no turtling at all and my dick felt a little bit softer than before. I think the rubbery feeling is just that my dick is very well-conditioned.