Here's another data point. In South Africa, in black African culture (can't be more specific than this, unfortunately), it is considered polite to enquire after

Here's another data point. In South Africa, in black African culture (can't be more specific than this, unfortunately), it is considered polite to enquire after someone else's health when greeting: "hello, how are you". Or rather it's considered rude NOT to enquire. The standard response is "I'm fine thanks, and you?". When I listened to talk radio in South Africa years ago, I remember white people calling in, and wondering why the automatic response to the phrase "hello" was often "I'm fine thanks and you".