Wrong Side

SMS Dialogue:

Sophie: Damn it! The taxis are always on the wrong side of the road!
Zephie: Funny! If this is so, it means you are the one on the wrong side! Haha.
Shiqin: There is no wrong or right side! A cab driver with an empty car who sees a customer on the other side thinks he himself is on the wrong side! If you go to the other side and miss a cab on your original side, does it mean the side you thought was wrong is right?
Sophie: Exactly! I crossed the road twice but the taxis are always on the other side!
Zephie: Haha... a case of karmic conditions ripening to present "the grass being greener on the other side!" reply