You have been at sea for a long time. Finding land, you weigh anchor and go ashore to rest.  You find a cave and  enter.  The cave is huge!  There is furniture and food, and even a small corral. You announce yourself to see if anyone is home, you certainly don't want to be rude, but you had no knowledge that this cave was someone's home.  You don't mean to, but you're exhausted and when you see a comfortable pile of sheep skins, you sit down, for just a minute.  Just to rest.