ok, what are the sexes of the pieces ?
The king obviously is a boy.
The Queen is a girl.
The Bishops ? they must be boys.....too trickery a job for a girl.
The Knights , no mistery here. Of course, if you call them horses, then we have a dispute. Could be a horse and a mare, two horses or two mares.
The Rooks, again no mistery, they are like archbishops. Boys,of course.
Now, what are the pawns. Say boys .....ouch , it just hurts becoming a Queen. I could be mistaken though, there may be some happiness in an eunuch's life ( the prospect of check-mating ), just not in real life. Say girls......well, this could be. From Amazon fighters they turn into Queens. It's a history fact.
This could be, but what happens if the pawn decides to change into a horse ? this theory is not 100 % valid. Such a pity....