I’m a moth

I walked into a dentist’s office. The dentist asked me what the problem was.

I said, “I’m a moth.”

The dentist said, “You’re a moth?”

I said, “Yes! I’m a moth. I act like a moth. I think like a moth. I’m a moth!”

The dentist said, “Sir, I think you want the psychiatrist’s office. He’s two doors further down the hall.”

I said, “I know. I was on my way there, but your light was on.”