The elaborate backstory that Brooks created for his fictional alter-ego was supposed to lead to a movie called 'The Lamb' ... but that movie was never made.
There comes a time in a persons life where they want to mix things up a little bit. Some buy a new car, try a new sport, get a new girlfriend or boyfriend. Most of the time it depends on what you do for a living, how much money your working with to start a new activity, how much time you have to spare, I'm pretty sure you get the point.