So when I pass other residents of my condo complex, I find this happens:
If it's a solitary person (male or female), they almost always smile and say hi.
If it's a couple, they look down and avoid eye contact.
Has anyone else encountered this phenomenon? Is it selfishness (I don't need to be nice to you; I've got companionship), or,
well, selfishness is all I can come up with.