Aaroona: Because some of us get busy.
Right Noe is a classic example.
I had three notfications come in from these replies.
The first too I was too busy doing something to look.
Now when the third came in. I wasn't busy.
If you are busy, why even read the first email notification in the first place? Leave it unread and read it when you are less busy, that way you won't forget it is there.