Damn, this is meta.

Based on this article, no. No they should not.

I was having the same problem, thought it was just my machine. Happens to me when I'm listening to music in Chrome

Same. We are currently in the process of redoing our gender form as well, and after some research opted for "non-binary" rather than "other." If a user chooses non-binary, they're then given an optional text field to enter the gender they feel most comfortable with.

From what I saw, this method manages to be both inclusive and free of bloat in the UI.

"User Exsanguination?" You've gone too far. There's no coming back from this.

/thread

Not exactly a course, but Hack Design has a great list of curated resources. https://hackdesign.org/lessons