Every relationship with a coworker has its own unique dynamic. There are your coworkers that you vaguely nod at as you walk by the coffee machine, and there are those who become a second family to you ...

Got candles? Cake? A thoughtful gift? If so, then all that's left is to warm up your vocal chords ahead of singing “Happy Birthday” and signing the card. If you've picked out just the right one, but ...