A couple of years ago I used to have a bag I carried my things in all the time. I would regularly be asked "why do you have a bag?"
Two years further along the line I no longer do this for various reasons (mostly never really having much to carry round). I am now frequently asked "why don't you have a bag?".
Which leaves me with the philosophical connundrum of what is the default position for man? Bagged or unbagged?