I'm fairly certain that the sounds of these words, in any language, are hard-wired into the human brain in a similar way to the pain response. I theorize that even before the advent of language these words had their intrinsic meaning.
Why do I say this? Personal Experience. Not long ago I was in my first real relationship. Not having had previous relationships and the fact that I don't watch much tv had the effect that I wasn't really farmiliar with the significance of these words.
when I heard these words coming from my girlfriend's mouth, it was like a physical sensation, for a moment, I think, my fight or flight reaction was invoked. I instantly understood that Very Bad Things were happening. The sound of the words went past the speech center in my brain and hit that one spot reserved just for such a case.
It's funny, I suppose, that these sounds ended up being mapped to the words "we need to talk", it seems so innocent...