The psychologist says, "Tell me about yourself?"

The man replies, "It is my deeply held belief that I am in fact a moth."

The psychologist is a little surprised, but being a professional, he thinks for a moment and says, "Well, I am sure I can help you overcome that."

Indignant, the man shoots back, "No way! I love being a moth, thank-you very much!"

"So why on Earth did you come in here?"

"Oh, well I was just passing by and I saw your light on..."