Sometimes, it just comes to you from out of the blue and you have no idea why. Maybe it's a state of mind or maybe the muses are having a laugh. Or perhaps simmering someplace in your psyche is an attempt at being bolder. Of course, it could have been inspired by the label from the egg carton that was lying on the counter.
The answer is as inscrutable as the greatest philosophical question of our time: Why DID the chicken?