The posting by Kandi Robbins make a lot of sense, especially this sentance:
"I fool no one, but because I try to conduct myself with some class and I am always smiling, people (mostly women) tend to be drawn to me."
In the end result, passing is really not all that important, but it is nice to be accpeted. Being relaxed and putting on a happy face goes a long way.
I've noticed that when I go out on the weekend after a busy week, I can be a bit tense and my factial expression shows this. It can be even a bit frightening. This can affect the way others, such as store clerks, react. Last weekend I was not at all tense, and the clothes I was wearing made be feel extremley calm and relaxed. I don't know or even care if I was passing but the store clerks treated me with a degree of pleasentness and even kindness I don't get when I'm in drab!
When you go out, make an effort to look pleasent, don't be uptight about how others may think of you. You'll just blend in and have a great time.