Could also be why couples tend to cut off things and they know what the other means.

"Hey hon?"

"Cokes are on the bottom shelf of the fridge"

"Sweetie?

"No thanks, I don't want one."

This is also the reason why we tend to mourn the loss of someone.

After interacting with someone/something very often, the brain starts to trigger the same patterns even when they aren't there. This causes a memory of said person/thing.

Grief is when you remember the person, but need to convince the mind that the person cannot return.