As I grow older I'm wondering if my increasing love of sleep is in inverse proportion to real waking stimulation in the brain. Although I can't recall all my dreams, the ones I remember are quite awesome. (For example just last night I was exchanging diaries with Richard Branson, quite bizarre). Could it be a case that we become bored with the current state of the mind and crave some better stimulation? I have noticed that depressed people tend to sleep more and I myself am more inclined to snooze on a rainy Sunday afternoon.