Look It's mostly an awkward hello to people we don't know that we are in an awkward situation with. Like getting in an elevator only one other person is in, sort of a hi don't worry I don't intend on being creepy or murdering you
Yeah, a lot of us who do that have resting bitch face. It's pretty much the only "I'm acknowledging your presence but don't intend to speak to you if I can help it" face we can manage without looking like a serial killer contemplating peeling off your skin. Sorry about that.
But I'm black.
*skin begins to peel off*