the.com/tartness
the chemical slap that makes your salivary glands stand up and salute.
acid triggerHydrogen ions hijack tongue channels to scream sour
survival hackSour warns of unripe fruit and spoilage
saliva floodLemons spike spit production within seconds
pH rangeMost sour foods fall between 2 and 5
taste only humans loveWe oddly enjoy a danger signal