I do this.

If I know you and don't like you then I smile like this.
But if I know you and like you, then I will actually smile.

When I see a white kid smile like that I run like hell!

I'm black and British this is how every British person smiles at you in the street. I do it and l actually see as a way of saying "evening or morning" politely

I smile at no one. Ever.

It's funny cause its accurate

Just with black people? I don't know about you but this is how awkward I am with everyone

It's an expression of appeasement...

I always do this when I am low key sniffling