Some days, I lack the patience to be diplomatic due to tiredness or stresses. Other times, it is due to the person I am speaking with.
Some people say things that show so little understanding of a topic or situation that it would take a huge amount of effort and time to spell out why and justify every reason at every corner.
That is when I get short-tempered and smack them on the nose and say "bad monkey".
I don't have them killed and this should count for something.