India, Jan. 16 -- Berlin (dpa) - People who gnaw like beaverson fingernails, idlewhen given work to do or "ghost" friends and dates can come across as skittish, lazy to the point of being sackable, or obnoxiously narcissistic. But such self-vandalism could well be rooted insurvival instincts. So says psychologist Charlie Heriot-Maitland, who in his newly-published"Controlled Explosions in Mental Health" seeks to explain whypeopleseemingly cannot help but engage in reputation-damaging "small harms" and "self-sabotaging." "Someone may procrastinate starting a project, causing themselves harm, but trying to prevent a higher-stakes harm of failure or rejection," publisher Taylor & Francis says in a press release promoting the book. According to...