For what reason excessive sleeping is not good?

Oversleeping is harmful for health because this leads to many problems like- heart diseases, diabetes, or even decreases the life span of a person.

..and other random thoughts:

Well, Art is Art, isn't it? Still, on the other hand, water is water. And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now you tell me what you know.
Groucho Marx