most men don't know what fashion is, only what's extremely comfortable or very convenient--for them.
That's probably right. And I prefer it that way. Rules? What rules?
srsly though, I'm not trying to be deliberately obtuse, but I do take issue with the concept of 'rules' in fashion, as if there's things that I am required to wear just because everyone else is. Like I said, I just wear normal black pants, plus T-shirts (in warm weather) and sweaters (when it's cold). Those things will always be "permissible" to wear, they are outside all considerations of style that I can see. So there is no danger it will run into such arbitrary and shallow definitions like "fashion".