How come I have to bring the camera?

How come I don't have a camera because mine broke?

How come I bought 15 cans of tuna fish today?
How come there was only ONE good canteloupe at the store and they were on sale for $.88???
How come I was ticked because that (and the tuna) were the sole reason I went to the store?
How come I feel like a sell-out because I got one of those savings cards?