I thought the defining characteristic was buying bids (more than 2/3 of the time, or so). You know, someone makes a comment or suggestion and the other person a

I thought the defining characteristic was buying bids (more than 2/3 of the time, or so). You know, someone makes a comment or suggestion and the other person accepts it (not necessarily agreeing with). In awful relationships that simple transaction is short circuited by passive aggression or the similar negative behaviour.