Teen Wolf, Season 5

Mason:
Okay, well, I've been doing some reading on kitsunes...

Kira:
[confused] Why?

Mason:
'Cause I met one?

Kira:
Oh. Right.

Mason:
Do you know why people in Japan answer the phone "moshi moshi?"

Kira:
"Moshi" means "hello."

Mason:
Yeah, but there's a reason why you have to say it twice on the phone. Because, according to Japanese folklore, fox spirits have difficulty with language. And the way that you prove you're not a fox? When you answer the phone, you say "moshi" twice. The important part is "moshi moshi" confuses kitsunes because it's a language trick. So is the book-- you know, it's just one long language trick.

Kira:
That's why I can't read it?

Mason:
It's affecting the fox part of you, confusing it.

[Suddenly, the electricity flickers, and Mason gives her a look]

Kira:
I swear that wasn't me.