Dogs do it too. I recently made a quilt for my DH who is a truck driver. After laundering it and the matching pillow cases I folded them and laid it on the back of the couch as I was gathering his things to go out on the road. I turned around to get something and when I turned back around one of our dogs was already laying on it. They all three took a turn. Our couch is about 12' long so it was no accident that they all chose that spot. I don't know why they do it but they also love clean laundry. My 13 yr old will pull it down to the floor and lay on it.