Real talk... all of the biggest dicks in porn are shitty performers. OP is right, none of them can keep it up and they all seem super sensitive. It's hilarious to see those guys trying to 'wake up' their cocks, doing more clit-tapping than fucking. They really can't effectively get into any hole consistently even if they could keep it up. The only thing a huge dick is good for is visual appeal and conversation.
Yes, exactly. Kinda drags down the scene when the guy is supposedly having such a good time and is so into the chick he's banging and yet his dick is like a wilted celery stalk he keeps having to fiddle with in order to penetrate the girl. Really screws up the pace of the scene in fact by slowing it down because the girl keeps having to sit, lie, crouch, etc. there while she or the guy tries to get his dick in her, haha. I await the day when the trend becomes based more on hardness than size.
I have to wonder if the commonality of big dicks being softer is due to a genetic tendency for bigger dicks to not be as hard compared to smaller ones, or if it's because of the surgery some of these guys get to make their dicks larger. Either way, I think this is a good case of the expression, "Quality over quantity," -- for the most part at least. (Wouldn't want a super hard 2-incher, haha.)