You know that hissing sound when Darth Vader breathes? It's not the breathing machine you've been led to believe. Really, what you are hearing is Anakin sighing because his boots hurt his feet. And Yoda doesn't talk funny because he's old and wise - his feet are sore! If only they had some nice cozy slippers to nestle their tootsies into. Good thing, at least, you can.
Star Wars Jedi Slippers