I used to offer an explanation for every request I made of fellow employees.  I would also apologize in advance whenever I thought someone would be offended or put out by something I was going to say or do.  I've learned it's better to hold onto my explanations and apologies.  "I'm so sorry to have to tell you this....... Here's the reason why I......."  I simply hold onto explanations and apologies until an explanation or apology is in order and or is requested. 

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