Humor often brings two different thought interpretations together in quick succession. In this sense, a logical assessment from any statement, while tacitly understood, is still illogical.
How seriously should any notion be taken? Perhaps only as seriously as we take language, music, politics, or art. Given we are prone to place undue importance on many things, including ourselves, applying logic to any thought, despite the tangible value, is in itself, illogical.
If you think about it, humor is riddled with faulty logic and simply representative of that faulty logic inherent in the history of human thought. In this respect, humor is like sitting center stage to a giant cosmic joke in which, despite our willingness or propensity to fuel the plot, we continue to do so. That in itself is funny.