WTF! THE FIRST GENDERLESS PERSON!

Census-takers may soon have to add a new check box for gender.

And the thanks for the confusion goes to Norrie May-Welby of Australia, who has passed as a man — and a woman — and is now the first person legally designated neither, London's Telegraph reports.

The genderless 48-year-old was born male in Scotland, and moved Down Under at age 7. Twenty-one years later, May-Welby underwent a sex change, but really wasn't happy living life as a woman either, according to Telegraph.co.uk.

Which left neuter, naturally — and that seemed to fit.

"The concepts of man or woman don't fit me," May-Welby said. "The simplest solution is not to have any sex identification."

And New South Wales government officials amended the Scottish Australian's birth certificate to reflect "no specific sex" after doctors were not able to make a gender determination, Telegraph.co.uk reported.

"There is no reason for still insisting that our legal identity must include a public statement about a very private matter, our sex," May-Welby wrote in, er, zie (a gender-neutral pronoun) blog.

The UK's Gender Trust welcomed the case. "Many people like the idea of being genderless," a spokesman said, according to the Telegraph.

The restroom question has yet to be formally addressed.