Wear want you like. Suit and tie, shorts, t-shirts.
Have as many tattoos as you want, even one of those little ear lob stretching earrings.
You will all get the same answer through a shut door "Sorry, we will have to pass, I would open the door but I can't trust my dog not to bite, have a good day."
I am a friendly guy, know most of my neighbors (just well enough
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Period...