So many questions, so little time

Why does the traffic seem to move better when traffic lights are broken?
Why does a aqueeky wiper blade make me so angry?
Why do some people think its OK to throw rubbish out of the window?

If doughnuts didnt have holes in the middle they would be stodgey because they would take much longer to fry.The inside of the hole is the outside of the doughnut.