In the previous episode, I did give a quick example of this and it really comes from the idea of a dog. So if you do something with your tail between your legs, it's like you're a shamed, you feel embarrassed, you feel sort of humbled by something. In Paris, they say, there's less poo on the other side of the street - which is quite specific to that city. And in English, we say the grass is always greener on the otherside. The alternative always seems better.