Between you and me, one of the hottest things about the session is the innocence of the three fresh studs. The guy in charge isn't a "Master" or "daddy" type, and his commands are playful, not degrading. He doesn't bark orders -- he simply has the erotic vision to make good suggestions, and his buddies are game and end up loving every minute of it.
Of course, muscly masculine Masters can be incredibly hot, too. I woke up today thinking about a great porn scene involving a cop and his forbidden lover. In this particular scene, the twist is that the cop isn't the dominant partner. His butch buddy tells him what to do. Their foreplay is molten hot, as during the proper moistening of bulging briefs with a drooling tongue. The men in question are Marcus Iron and Gus Mattox, and their most amazing moment is when they stare deeply into each other's eyes as they shoot off together. The intensity of that eye contact is simply breathtaking. It's a stunning testament to the powerfully intimate connection two powerful men can share. (FYI, here's the DVD I'm talking about.)