1. The intern
So much can go wrong when dating an intern, assistant or any other underling that such temptations are best left alone. If your colleagues find out about this office romance, there could be cries of favoritism.
2. The IT guy or gal
Nothing beats having your request for computer assistance rise to the top of the tech support queue. But fall out of favor with your technically inclined valentine and you'll have to endure the tech support call of shame any time your computer has the hiccups.
3. The boss
Throw sex, unrequited love and/or an ugly breakup into the mix and there's no telling how far your professional reputation could plummet.
4. The boss's spouse
Sleeping with a married coworker is never a good idea. But sleeping with the boss's significant other is nothing short of career suicide.
5. The serial dater
Cozy up to the office philanderer and you make yourself a prime target for professional gossip and hostility. Not only can your reputation plummet overnight, your colleagues may have a hard time taking you seriously.