I guess this is the puppy equivalent of fluffing your pillows? You almost can't be mad at them for wreaking such havoc on your footwear when they put it that way...
My Japanese Chin when she was a puppy taking a nap on my pillow
My dog Quincey Pete as a puppy. He fall asleep in a little basket.
My two new baby degus (about 7 weeks old), getting used to their new home.They totally ignored the nest I prepared for them and decided that the best place to sleep was the exercise wheel.