Most of us have an ex we should never, ever, ever, bother speaking to again. Ever. Whether they are an abusive dirtbag, or a pathological liar, dating someone else entirely, or simply the wrong fit, we know in our heart of hearts that responding to them in any capacity is simply the wrong thing to do.
That doesn't stop us from messing up every once in a while, though. Here are 17 reminders that'll help you put a block on that number rather than engaging in any sort of ultimately pointless conversation.