Difference - Fixed and Single Speed?

[Wogan]

i don't recall walt disney ever doing an animated film about beef curtains...

Disney have made loads of risque films:

Man catches STD from a filthy volkwagen: The Love Bug.
An expose into the production of a specialist gentleman's magazine: The Jungle Book.
Hard hitting documentary on fetishism - Bedknobs and Broomsticks (that scene with the broomstick made me wince).
Arsecrack plastic surgery - The Emperors New Groove

...and who can forget the tragic tale of mental breakdown that is Herbie Goes Bananas?

 

[romans]

Rustychisel is spot on. You can buy hubs that have one side fixed and the other single. I build mine having hubs both sides fixed.