I see some larger women who wear men or unisex clothing and have a short haircut. But you can still tell they are clearly women. Thing is...I feel some, especially this one really butch woman with tattoos, look more masculine than I do. Perhaps with the exception of their voices. But yeah...they are clearly female beand get called ma'am. Why do I get called sir and not them? Furthermore, I saw them as female on sight. I saw myself in a mirror and for a second thought "oh, that's a large Asian man." When I see myself and don't expect it to be me I see a guy. And so does everyone else. So why am I seen 100% as male and not thee women who I think look more like men than I do? What is the difference?
I'm sure they are called sir sometimes. But surely not all the time. It isn't the voice because I get called sir before speaking.