Tooth fairy: dude or lady?

I’m visiting the Pacific Northwest this week with my mom and sister. Last night, we were playing the game Heads Up! (check out the app if you haven’t heard of it–so much fun!).

I was trying to get my sister to guess “Tooth Fairy” and gave her the clue “the man who comes into your room and puts money under your pillow.” She heard the first part and guessed “Santa.” After she’d guessed correctly, she asked me, “what did you mean, man?”

And that’s when I discovered my mom and sister imagine the tooth fairy as female while I’ve always thought of him as male.

What do you think? Is the tooth fairy a dude or a lady?