Authenticity
n. 100% pure synthetic, formerly never used of persons for reasons no longer obvious, a vestige of dead Romanticism cut from its corpse and cherished and venerated like a talisman in the pursuit of episodes of emotional excess.
Not coincidentally it is a disease particularly afflicting the young, who have little experience of being reliable, dependable and trustworthy but account for half of the 20 million new diagnoses of sexually transmitted disease every year. And more generally the world's fish population.