Shake that ass

A man in a blue and grey striped shirt stands with his back to the camera, leaning over a bunk bed where another person lies on the top bunk, while a third person sits on a lower bunk, looking up. The man in the striped shirt remains mostly stationary, occasionally shifting his weight, as the person on the lower bunk looks up and then down, while the person on the top bunk remains lying down. The scene takes place in a dimly lit, confined space resembling a bunk bed in a dorm or cabin.