Yeah, I don’t know - while I agree with the basics of this, some specific situations come into mind.
When I’m working girth routines, the norm is to wake up with a softer, but fatter dick; I think this is part of the growth process, where the body tries to fill up your dick in another direction, which ipso-facto means your length, and total shaft is unable to achieve rock hard proportions. If I woke up and spent the rest of the day with a fatter, but softer dick, I would leave it alone until it had filled out again, but this is never my dick’s MO - what happens is, I wake up softer, but when I go to do my workout, I achieve rock-hard erections fairly easily. So what does this imply? I think what’s happening is my dick is working on getting fatter at night, and during the day, it returns to it’s normal state, albeit, just slightly larger around.
With girth, I feel there’s a push and pull that goes on with your erection quality, and to me, this is what signals growth.
Going for 6 inches of girth, wish me luck.