Gisella, it feels exactly like what it is: engorgement by liquid. You feel everything in there - the spongy tissue, foreskin, head, "skeleton", "bone", everything - slowly growing and swelling until they are maxed out and ready.
Kind of like when you inflate a toy or balloon and no more air fits because it is full - except with blood. It's a nice feeling
My erections have always been hard. I'm in my late 20s and I haven't noticed any drop in performance. If anything, they've gotten harder! Like with anything else, I think if guys take care of their bodies, they can expect better function, but everyone is different. I'm glad you appreciate a hard one.
this describes me spot on. The only real difference is I don't really get spontaneous hard ons any more. Also, it tends to take some sort of physical stimulation to get me hard...or porn (and that has never changed lol)