From what I can recall, I've been misconstrued as a female only 1 time.
in 4th grade, there was this new student that was immensely curious about his surroundings.
then he suddenly points to me and asks this other student that he knows a bit well:
"Why does she have that snack on her desk? Do we take it out?"
"Dude hes a boy"
"oh.."
its egregiously seldom that im interpreted as a girl because im actually really noticable to somebodies eyes being thought as a boy, but sometime at the end of the year I discovered that the new student was a bit blind and had the difficulty of seeing correctly.