He's not really alone..he's occupied with his own horniness.
Leo comes in and takes off his leather jacket- flings it off his torso with a rushed anticipation. The look in his eyes is a little devious, and when he starts flicking a lighter, the mood shifts to something deeper. He lights a candle and lets the candle wax start to drip down his pale chest. The bright red liquid leaves a trail behind. Marking the spots where for a quick second pleasure and pain have had a chance to flirt with each other.
Leo rips off his leather underwear and begins to play with himself. He introduces a vibrator and edges his increasing sexual energy. Soon he fades away in a state of self induced pleasure.