Dexter told Delilah that stretching is so very important. It keeps you limber and lithe and will help you stay nimble for leaping onto places you aren't supposed to go. It also helps when you need to leap down again when your Mom yells at you to get down.
You must stretch every time you get up and sometimes while walking across the room you should just stop midway and give a big tail-in-the-air stretch. Sunbathing is another good opportunity. You are already flat out on your back so you can really get a big stretch going and it feels just awesome! And stretch everything - even your jaw muscles.