Courtesy. Is someone thinking of you or not?
Too often we think about what someone does for us and not what they didn’t. If someone knows you’ve been outside in the heat all day and the first or second thing out of their mouth isn’t “Can I get you something to drink?” then you might have a problem.
Someone explained this to me much better a long time ago, but it’s worth pondering. What is someone not doing that would be nice if instead, they were doing?