A big man needs to be careful when he's with a smaller lad, so perhaps therein lies some of the attraction -- that he's very strong yet tender shows he cares for me. He can completely dominate me when I want that, but he's confident enough to let the tables turn, too, and be submissive.
This set would have been hotter had the big bloke let the little one top him, but I guess the pornmeisters didn't want that. Jeremy, the strapping one, has bottomed on occasion, so he's certainly not afraid of cock. And his hole, as seen in some of the pictures, is just begging to be filled with something thick and hard.