Teenagers, sleeping, eating etc

The sleeping thing is the most baffling of all.
How can someone sleep for 13 hours straight and still act like a whiny arse when he gets up?

Our shopping bill is now going through the roof. £12 spent on a large organic chicken last weekend, which was deemed by him to be "too small because I am growing loads and need lots of protein."

WTF?



Not bothering with putting any rubbish in the bin, we now find various items of food leftovers strewn all over the computer desk, or shoved down the side to rot away.

It's all very confusing as to how a child can eat this much and never put on any weight.