Adam is known in the business to have a small package-- both cock and ball sack. and proud to show it off. while his shaft is short he has a delicious mushroom head inside his foreskin which hangs a bit over the head until erect. he'd have no trouble getting a line ready to suck his little nuts dry/
I've seen more recent footage than this where Adam is sporting an erection. He's a grower, because the tiny thing you see here is completely average when erect.