Five surgeons are discussing who is the best to operate upon.
The first says "I find accountants the best, when you open them up everything is numbered."
The second surgeon replies "Personally I like electricians, everything inside them is colour coded."
The third surgeon responds "No I reckon Librarians are the best. Inside everthing is in alphabetical order"
The fourth surgeon said "I like construction workers, they understand when you have a few bits left over."
The fifth surgeon shuts them all up when he says "You're all wrong. Politicians are the easiest to operate on. No guts, no brains, no spine and no balls. Plus the head and the arsehole are interchangeable"