This guy was driving down the highway and was pulled over
by the cops.  The cop asked the man for his name and the
guy replied, "Earl."

"You got a last name, Earl?"

"Nope.  It's a long story, Officer."

"I got time."

Earl sighs and says, "Well, Officer, at first I was known as
Earl Doo-Daa.  I was going to school to become a doctor, and
I did, so I was known as Earl Doo-Daa, MD.  I got bored just
being a doctor so I went to dental school, graduated, and 
became Earl Doo-Daa, M.D., D.D.  After a little more time I 
fooled around with this girl and got VD.  So I was known as
Earl Doo-Daa, MD, DD, with VD.  When the medical board
found out about my VD they took away my MD so I was known
as Earl Doo-Daa, DD with VD.  The dentistry board also found
out about the VD and took away my DD making me Earl 
Doo-Dah with VD.  Finally, the VD took away my Doo-Dah so
I'm now just Earl."