The burden of things is their need for space. Each thing must occupy its own space and no two things may occupy the same space. Waves are exempt but none of my possessions are waves. This is why I need shelves.
The burden of company is the same. Bodies are like things except they complain when stacked in the corner or strewn about the floors. At least, living ones do, and I don’t invite the dead. This is why I need sofas.