A man walked into a bar, sat down, and got into a conversation with two other guys. They introduced themselves, one saying "I'm Bill Smith", and the second "I'm John Jones". The new guy introduced himself as simply "Fred". When asked what his last name was, he replied "I don't have one." Naturally, Bill and John were curious so they asked him to explain. Hold onto your hats; here it is:
"I was born Fred Johnson. I studied hard in college, got into medical school and become 'Fred Johnson, MD'. After practicing medicine for several years, I became bored so I went to dental school. Then, I was 'Fred Johnson, MD, DDS'. I also had a girlfriend who gave me an unwanted present, so I became 'Fred Johnson, MD, DDS, VD'.
"The ADA found out about the VD so they took away my DDS. That left me as 'Fred Johnson, MD, VD'. Unfortunately, the ADA told the AMA and the AMA took away my MD, making me 'Fred Johnson, VD'. My personal MD managed to take away the VD but before that happened, the VD took away my Johnson. So now, I'm just plain 'Fred'."