Comedic value is gained from the over emphasis of how much the person would not like to do said activity.
May have origins in a quote from the popular computer game "The Curse of Monkey Island" released on Windows 9x
Murray: You may call me ‘Murray’! I am a powerful demonic force! I am the harbinger of your doom! And the forces of darkness will applaud me as I stride through the Gates of Hell – carrying your head on a pike!