[deltaonenine]

It's from the US. Sees candy boxes are loaded with random chocolates and you won't know what the chocolates contain until you put one in your mouth.

The quote was made famous by an old US movie starring Tom Hanks. The movie is called Forrest Gump. Fittingly, the character who said that quote is mentally challenged.

https://www.youtube.com/watch?v=CJh59vZ8ccc

[simondotau]

Yes, I saw Forrest Gump when it was in cinemas. I do understand the theoretical concept of a boutique, hand-selected tray of chocolates which one cannot guess until after they're opened. It's just not something I've personally experienced.