Parents teach your children and especially young men to make eye contact with people when passing, with the small head nod and/good-morning, etc. I know awareness of self and others is on the decline, but conscientiousness is a trait that is more important then IQ…this helps develop it. Doesn’t matter if it is the Walmart greeter or country club locker room. Or a crosswalk and somebody letting you pass in front. Or holding the door for a person with takeaway food. It shows awareness of surroundings and a confidence, and acknowledges the other person, and sets a proper tone. And it is also the secret guy code of letting others know, if stuff goes sideways…you are part of “Team run to danger and help”.