Douglas Adams Quotes about Exercise

Douglas Adams (2016). “Dirk Gently's Holistic Detective Agency Box Set: Dirk Gently's Holistic Detective Agency and The Long Dark Tea-Time of the Soul”, p.388, Simon and Schuster
If they don’t keep exercising their lips, he thought, their brains start working.
Douglas Adams (2010). “The Ultimate Hitchhiker's Guide to the Galaxy”, p.59, Del Rey
Douglas Adams (2009). “The Restaurant at the End of the Universe”, p.100, Pan Macmillan
Douglas Adams (2017). “The Hitchhiker's Guide to the Galaxy Omnibus: A Trilogy in Four Parts”, p.128, Pan Macmillan