Sound, i'm not sure it means someone is willing to talk. it's a word everybody says when they meet someone, like it's a rule and if you don't respect it you're pure evil. When neighbours meet they say hi quickly and go away, none of them are willing to talk, i don't get it
one-A-N, i noticed the answer to "how are you doing?" is "fine". it doesn't matter to them if you're great or down, they're just asking because it's the rule. they don't really mean it. just answer "i'm fine", that's all they need. they're also ok when there's no answer.
Eggman, thanks, didn't help though.
The question "how are you doing?" is an actual question. If you are feeling miserable, you are allowed to say "miserable" - but be prepared to talk about it with the expectation that they might be able to help you out. If you don't want to talk about it, it's the default "fine" and everyone smiles and carry the conversation on to something else. If it's an occasion and you feel great and you want them to know, say "great!"