I've always considered Fay to be a boy that sometimes enjoys dressing up like a girl.
His sex might be more ambiguous to others.
The character of Fay doesn't really follow gender norms and is often a social outcast.
He loves wearing that pink bow to look his best.
Obviously other people around him are gonna ask questions about him.
Fay is an androgynous male that behaves as both brother and sister within his family unit.
His father is an undead corpse and the mother is washing machine robot.
That was my own personal understanding of the overall story based on several Fay movies.
The actual flash being reviewed is based around Fay's androgynous nature.
Most Fay movies don't call attention to Fay's androgynous nature.
The focus is usually more directed towards understanding the character as a living entity.
There is more to Fay than his fashion sense and androgyny.
This movie doesn't actually answer any questions in regards to Fay's sex.
Is Fay a boy or a girl?
This movie simply opts for a silly visual gag instead.
These visuals didn't actually any questions about Fay's true sex.
This movie's only goal was to entertain the audience instead of answering irrelevant questions.
I assume you want the audience to use their imagination and come to their own conclusions.
I enjoyed this silly little short movie.