These two men are very muscular. This is not something that usually impresses us in and of itself, but in this particular video it's great because their bodies knock against each other like two perfectly carved wooden blocks.
Personally, we tend to go for bigger guys because there's something soft and enveloping about a big bear or daddy smothering you with their bodies. Of course, when you're a bigger guy with zero percent body fat, that feeling of being smothered becomes a lot more like the feeling of being beaten with a large blunt object. This is definitely not a bad thing. Just check out the bottom in this clip. He's certainly enjoying it.