At the beginning of the video, the man at the bottom is seen moving his hips up and down…

At the beginning of the video, the man at the bottom is seen moving his hips up and down dramatically while penetrating the anus of the man in the middle, while the man in the middle is moving his hips up and down dramatically while penetrating the anus of the man at the top. The man at the top is moving his hips up and down dramatically. The first and last frames of the video are exactly the same.