Surgeons

Four surgeons are taking a coffee break:

1st surgeon says: "Accountants are the best to operate on because when you open them up, everything inside is numbered."

2nd surgeon says: "Nah, librarians are the best. Everything inside them is in alphabetical order."

3rd surgeon says: "Try electricians, man! Everything inside them is colour coded."

4th surgeon says: "I prefer Arsenal fans. They're heartless, spineless, gutless and their heads and a**es are interchangeable."