This is not a joke & I am not making this up! The BATF as recently issued updated 4473 forms for firearm purchases that has a third box that can be used to denote what sex the applicant is. The choices are now Male, Female, or Non-Binary. It also expanded to six pages, as the change from 2 to 4 pages in 2012 evidently didn't satisfy the Paperwork Reduction Act passed that year. Just a FYI, as I am at a loss for words.