The AI-powered English dictionary
a reflexive, third person gender-neutral singular personal pronoun
(rare, reflexive, nonstandard) Em, a gender-neutral object of a verb or preposition that also appears as the subject, the reflexive form of em, equivalent to themself (also used for emphasis). quotations
Eir sentences would sound smoother since ey wouldn't clutter them with the old sexist pronouns. And if ey should trip up in the new usage, ey would only have emself to blame.
1975 August 23, Judie Black, “Ey has a word for it”, in Chicago Tribune, section 1, page 12
In this particular instance, a wizard eventually took it upon emself to @toad Mr_Bungle...
2003, Elizabeth Hess, Yib's Guide to MOOing: Getting the Most from Virtual Communities on the Internet, Trafford Publishing, page 233
The adult worries much less; is cautious, sensible and knows how to protect emself and eir system from attack and error.
2004 March 31, Sue Thomas, Hello World : travels in virtuality, Raw Nerve Books, page 78
As he[sic] struggled to yank Sarah back to eir room, Edward promised emself that ey'd do whatever ey could to save what was left of eir sibling's sanity- and protect em from their monster of a mother.
2007, Morgan O'Friel, Larkenia's Flaws: Volume 1, Grand Rapids: TheSpindle, page 136