I don't quite get in what sense the word flange is used, as a connecting device? protective? A flange like this http://en.wikipedia.org/wiki/Flange (a type of gasket made to fit between two sections of pipe that are flared to provide higher surface area)? And why rough flange, not just a generic uncharacterized flange? Thank you.
That these intimacies were painful to Park, being based on a lie, his lie, was not unusual at all. Any intimacy was painful to him. Another exposure. Another rough flange that could be sheared away from him. Another potential loss in this world.