Making this into an indecent exposure thing is stupid. If the op had left him to empty his 8 pints of Stella up the wall instead of shouting at him and taking his picture, he wouldn't have waved his willy at her in the first place. Kind of dumb thing to do to be honest, have a go at a guy with his cock out then get all emotional when you see his cock. It was out before you spoke to him, though probably not facing you, so if you didn't want to see it, probably better not to make him turn around by shouting at him. Common sense really.