I think the "Teacher" is mired in the Highland Boggs with his head stuck in the sand. Depending on what your talking about, of course there is only 2 genders, although in a couple species both genders are represented in one critter. Just because a person finds out they are living in the wrong body does not imply there is another gender. Or maybe he is thinking a Unich is a different kind caled "Null"???