Around 11:20, what had started as a fairly conventional gangbang takes a different turn...
The very cute smooth guy getting fucked seems to get more and more zoned out in a mindless sex coma, and the guy fucking him becomes more gentle and "protective," holding and kissing him more and nibbling his ears. Then the top starts getting fucked in his own ass and in the process his dick slips out of the guy he was fucking, and so he just lays on top of the cute overwhelmed bottom, holding him for a while. It told a story of one guy seeing his bud had reached a limit and so he "took one for the team" in his place. Unexpectedly sweet from a movie called Pig Bottoms Say Uncle, lol.