Yeah, handle dusty dirty boxes for hours and hours every week and we'll see how squeaky clean you look. Not to mention the grease on the equipment (esp the baler) that always manages to get on you.
Still, there are some people in logistics who never showered, I swear. I know that you get sweaty working the truck, or running around an inadequately cooled backroom. But if you shower every day and wear deodorant, you should not be smelling like the compactor on a hot day, unless you have some kind of glandular problem or something.