Before the turn of the century, very few people had indoor plumbing. It was common in the cold winter month to just piss in a bucket and dump it as the weather permitted.
Even when going into town. It was rare to find a private shitter. Most people ducked down an alley and pissed along a wall, then continued about their business around town.
This is wierd but as a trucker I'm soo used to pissing on the side of the road in public, that it feels awkward to uses a normal restroom. I also notice a lot of other drivers using piss bottles, rather than the hassle of stopping and looking for a spot to park a 70 ft long vehicle.