How Many Spiders Do You Eat in Your Sleep? Everything You Need to Know to Sleep Soundly
To understand why spiders avoid human mouths, examine human sleep biology through an arachnid lens. Even during the deepest stages of non-REM sleep, the human body is far from silent or still. The chest expands and contracts continuously, pushing warm currents of carbon dioxide across the lips. The vocal cords vibrate subtly, saliva shifts, and the carotid pulse sends micro-tremors through pillows and bedsheets.
Spiders navigate the world through slit sensilla and trichobothria, ultrasensitive mechanoreceptors on their exoskeletons that detect air currents and substrate vibrations. To a creature weighing a fraction of a gram, a breathing human produces the sensory equivalent of a localized earthquake paired with a warm subterranean gale. An arachnid does not view a parted mouth as shelter; it perceives a monstrous, dangerous environment to be avoided at all costs.
