While only a professional should diagnose psychopathy, a psychopathic cowoker or boss may demonstrate some of these signs.
"I think the most telling sign is their sadistic nature," Andrew Faas, a former senior executive with Canada's two largest retail organisations and author of "The Bully's Trap," tells Business Insider.
When it comes to coitus with a cubicle colleague, the secrecy is undeniably at least half its provocative appeal.
Obviously, there are myriad reasons not to dispatch a company-wide memo after the first interlude: If it ends within two weeks, you do not want everyone else feeling awkward; it is infinitely easier to abscond to the copier room for a quickie if no one suspects your motives; perhaps it is frowned upon by your HR department; perhaps you're new at the company and don't want your reputation marred early on; or maybe you don't want all the office gossips spying on those awkward first few conversations at the water cooler.
Before making moony eyes at a co-worker: Think of the situation in the same way you would if you were about to hit on a bartender at your favorite local bar: Am I prepared to drink elsewhere if it all goes pear-shaped?
At some point (usually after three to six months) you must acknowledge whether it is just the secrecy that is sexy, or if true feelings have developed in one or both parties.
If you two have conflicting expectations, breaking up is the only honorable thing to do. If a serious relationship is budding, no need to hide it.
But how can you tell if you're working with a legitimate psychopath?
Psychopaths aren't simply jerks or bullies — they must meet a certain set of criteria, as outlined by the Hare Psychopathy Checklist.