One day Mick was walking along the road when he sees his old friend Paddy with a paintbrush in his hand, drawing a single yellow line along the side of the road.
"What are ye doing that for, Paddy?" asks Mick.
" This is because there is no parking along here at all ", says Paddy.
The next day Mick is walking further along that road, when he again sees Paddy, this time with TWO paintbrushes, one in either hand, carefully drawing TWO yellow lines.
" So what are ye doing, now, Paddy?" he asks his old friend.
"Well, ye see , Mick" replies Paddy, "this is because along here there is no parking at all at all."