This is something, in my humble opinion, that has got better since this cartoon was drawn – probably in the 1940s. The duvet, or “continental quilt” as it used to be called by early adopters in the 1970s, reduces the incidence and impact of wayward bed-clothing. I hasten to add the phenomenon hasn’t been totally eradicated, but here you can see that these two blankets are conspiring to separate, duvet’s don’t do that. They are also annoyingly covering some bits, leaving extremities to suffer chill. The bit of blanket around Ab’s head is an additional annoyance. I imagine it’s a bit itchy. Any attempt to rectify only exacerbates. Times were tough.