Cushions!
'Cushions' were supposed to be a thing of comfort. Over time, however, they have evolved to a level where they seem to be the rightful owners of your sofa sets. So much so, that sometimes it looks like other home dwellers need to seek their permission before even thinking about sharing their space.
The cushions that rule our big "comfy" sofa are the most respected members of our family. No one in the family has the right to dethrone them. Regular sofa-'space'-battles are frequent and are almost always won by them. And even when you try to co-exist peacefully on the sofa, some way or the other, these little pricks are constantly reminding you of their presence!
This arrogance did not occur to them overnight. Cushions have worked hard for it. Those things that were once primary weapons to attack one's siblings have successfully exploited the loopholes in the humans' constant endeavour to look better. Hence they kept growing bigger and teamed-up with cushion covers. Covers that are now, supposedly, a representative of their owner's coolness, geekiness, humour, or modern-yet-contemporary-ness. They made humans perceive a sofa with basic or minimalistic cushioning as 'uncool'. What followed can be termed as 'The Wrath of the K(ushio)n". We started seeing sofas in which one would have to search for a 3-year-old if left unattended. If the sofa weren't "plush" enough, people started loading them with these monstrosities to make them look so.
Come to think of it -- in an afterlife, given a choice, I would want to be a cushion -- not just any cushion, but a sofa cushion. Until then, sadly, the argument continues.