Sir, is just a polite way to address people you don't know the forname of.
It's rarely used by the English any longer unless you go into a very posh shop or you are talking to you school teacher or applying for a job.
I would say Man ID Unknown has been taught better English lessons than most of us get in school

p.s. another way to make objects bigger without scaling is to make your world smaller. It might sound crazy, and you are wondering why you should ever do it, but by shrinking things below 16bit/65000 units can realy speed things up!