When they say "I love you" to each other after the top injects the bottom with his sperm! I think that put me over the edge. I loved it - hearing that from two manly-sounding, grunting, groaning men.
I just got fucked in Vegas by an out of town guy almost the same exact way, he'd never been with a man before and we had quite a few drinks before I went back to his hotel with him, I let him fuck me the same way this guy got fucked and he had a drunk dick so he fucked me for a long time and he had a big cock, I love getting fucked like that for hours taking my man's dick in my ass god it felt so good when he exploded inside of me