Betrayed by spell-check

I have read posts where spell check was not able to do its thing. For example, someone writing about how language refering to "body" parts works in Hebrew, wrote "boy" parts instead. Yes, pray tell me, how do words refering to boy parts function in Hebrew.

But yesterday, I learned something about "girl" parts. Spell check is such a traitor. In a post about The Shack, the author wanted - I presume - to say that Sarayu is a wispy, ethereal female. However, she wrote that Sarayu is a "wispy, urethral female." I do not think of urethra as a gendered word.