Office Romances: How To Have One Without Killing Your Career

First the CIA chief resigned because of an affair; almost simultaneously, the president of Lockheed Martin was ousted due to an "inappropriate" relationship with a subordinate. Put aside the fact that both men are married and leaders of their organizations, which makes affairs more toxic. The question arises: Are office romances destined to ruin careers? What if you're single and think a colleague could be the love of your life? Is it always career suicide to have an office romance?