The grass is always greener on the other side of the fence.
'A beach house,' he said, 'doesn't even have to be on the beach. Though the best ones are. We all like to congregate,' he went on, 'at boundary conditions.'
(...)
'Where land meets water. Where earth meets air. Where body meets mind. Where space meets time. We like to be on one side, and look at the other.'
de "Mostly Harmless" por Douglas Adams.
Deve ser por isso que a grama parece sempre mais verde do lado de la.