I have met a few "Pats" in my life. Not sure if they were men or women. One, I talked to for several minutes, while helping to get his/her car started (after topping off his/her radiator). Even after the conversation, I still had no idea. No indication, generic clothing, no makeup, boy's haircut, but no prominent Adam's Apple. Nothing to say where it was a boyish girl, or a girlish boy. Even the voice was about as neutral as it could be.
Many, many years ago, on a business call, I was corrected when I answered “Yes, m’am” to the person at the other end. Even after he said, “I am a ‘sir’ not a ‘ma’m’”, I would have sworn I was hearing a female’s voice. Most confusing.