One day a snail goes out and buys a brand new, black Porsche. As soon as he gets it home he parks it on his driveway, gets out a paintbrush, and starts painting big yellow letter ‘S’s all over the car.
His neighbour sees this out of his window and can’t quite believe what’s going on, so he rushes out and asks “Why on earth are you painting those giant letters all over your brand new car?”
And the snail replies “It’s so that when I overtake people on the motorway they’ll see me speeding past and say ‘Look at that ‘S’ car go!'”