Though Elio and Jim may appear heavenly, they are human. With human desires that can’t always be controlled or contained. This is especially true of their desire for each other. Not only was this scene filmed at their request, but they also insisted on filming a couple of other scenes as well. Who are we to deny them their pleasure or you the thrill of watching it? Part 1 sees Elio collecting his reward for helping out Jim by fucking him, but as we all know Elio's preference is on the bottom, so in part 2 he get's all his wishes fulfilled.