I get bored with small talk but I learned to dance the dance by watching people. When people are around, usually I am quiet and I study them like a science. After many years of doing this, I can tell you that small talk with strangers is because NT's are petrified of being alone and will carry on a conversation about useless stuff just to bond with another being because they dont want to be alone. Isolation, deep in the pack animal psych, leads to death. So they talk small talk to ward off fear of death.
As far as ppl who live together or are close...small talk is like what someone here says is an emotional experience that goes beyond logic and rationality...but also leads to physical or emotional reproduction....which wards off extiction.
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All art is a kind of confession, more or less oblique. All artists, if they are to survive, are forced, at last, to tell the whole story; to vomit the anguish up.
-James Baldwin