Seeing a submissive man turn the tables on a dominant man is very hot. The dominant man would become a fallen top. Also, it is very hot when you have two tops, two dominant guys, two alphas maybe, fighting it out for control. Perhaps there would be a winner-take-all wrestling match between the two alpha males. The winner would totally dominate the loser and make him his boy, his slave maybe even. Finally, I also find it very erotic when one man falls on his knees before another to serve him. The defeated man kneels before the victor and totally submits to him. The man on his knees has been totally broken and conquered by the superior, stronger man standing before him.