There is something very calming for me to watch sleeping cats. As I write this entry one of my cats, Molly, is laying just above the keyboard asleep on my desk. She does this quite often when I'm working on the computer. Occasionally, she will s-t-r-e-t-c-h out and then immediately fall back asleep. I'm not really sure why I like to watch my pets sleep. Something about it brings something good to my heart.
Here is a pic of Molly fully stretched on our futon.