You're missing something very important. Imagine we are co-workers, and I come up to you and say "hello" and then stand there saying nothing further for an enti

You're missing something very important. Imagine we are co-workers, and I come up to you and say "hello" and then stand there saying nothing further for an entire 60 seconds. While you stand there and wonder why I'm there and what I'd like to talk about. It would be weird and rude of me. It is rightfully expected that one gets on with it and says what one has further to say, and in less than sixty seconds from the initial "hello".