This reminds me of the theory behind sickle cell anemia which can cause priapism, and is more prevalent in black men- theory being why there are some many allegedly big black guys.
A few years ago I was suggesting that wearing a cock ring at night sleeping could possibly lead to gains, having it just tight enough to cause and expanded erection. Over the last few years I have been doing it on and off with no real PE work in that time, I have not lost any gains, in fact am a tiny bit bigger, possibly due to a lower body fat level. I have no real way of telling but I suspect the erection is maintained for hours at night this way, I have at times woken due to pain, not really pain but just being uncomfortable in my sleep. I was also suggesting viagra to fully maintain this erection at night.
-of course unsupervised methods in your sleep could be extremely dangerous, you do not want to wake up to a dead dick…
The "average size" is usually over-estimated. Small guys don't take part in surveys and big guys jump at the chance.
Girl claims she had a huge ex? Stick a spider in the bathroom or a mouse in the kitchen and when she comes out screaming ask her how big the spider/mouse was...