Had a new experience today, Walked up front, introduced myself and said hello. Captain is filling out paperwork and says hey there give me just a sec. FO continues to talk to me about my domicile, captain turns around and says, "How long you been doing this?" I said, almost 8 months and he replied with, oh so your new well let me tell you a few things. First off, the first thing out of your mouth when you walk up here should end with a question mark, this stunned me because the first thing I did was introduce myself and ask how they were, then he said second your in uniform on a Delta flight, passengers dont know that you dont work for Delta and your making us look bad because you havent shaved today and your not getting on this flight. I was STUNNED because I had just shaved less than 24 hours ago and was in NO WAY in need of a shave. I just said Oh, I didnt realize I look that bad and started to leave and he said, if you go shave you can come back, at this point it was 10 minutes before departure. Was he expecting me to go the bathroom in atlanta and stand there at the sink and shave in the restroom?? I knew I wouldnt make in back in time anyways. I asked multiple other people tonight about my "facial hair" and everyone laughed at my experience, including the crew of the next flight that ended up getting me to work. What the heck is up with this guy??