I was reading this thread about seat-swap etiquette on AA (
http://www.flyertalk.com/forum/showthread.php?t=162770), but I recall a different spin I heard on radio.
A couple months back, a program host on the Cantonese KMRB-AM in Los Angeles told of his experience on the HKG-LAX flight.
He got a seat he liked. Once on board, a middle-age woman asked to switch seats with him, saying that she wanted to sit with her son. He declined.
He observed this woman the whole flight. Didn't see a son. Finally getting off the plane at LAX, he could finally confirm that there was no son.
Is this something unique to CX (compared to similar routings on other popular carriers such as UA, NW, CI, BR)?