A man went to a psychiatrist to seek some help for depression. As he entered the reception room he noticed two doors marked "Men" and "Women." He went through the door marked "Men."

He then encountered two other doors marked "Introvert" and "Extrovert." He went through the door marked "Introvert."

He then encountered two more doors marked "Those Making More than $40,000 per Year" and "Those Making Less than $40,000 per Year" He went through the door marked "Those Making Less than $40,000 per Year"...and found himself back on the street.