[The couch is a bad idea. Garrus is trying to avoid the couch... but there's a rather large comfy chair they can use, one that's been positioned to have a good line of sight on the entryway of the house. They're pretty close to it now, even.]

So it would be more like wearing a Di coat, instead of being a pile? And yeah. They're made so the carapace can sink in and not leave our heads without support. Others are made to let people sleep on their keelbone if they really wanted to. But I take a lot of pillows so I can sleep, here.