Here's a little piece of advice to everyone who works in an office:

If one of your co-workers sends an email to the entire office, trying to unload her daughter's tickets for Shakira's concert tomorrow evening, and you are a single male in your early thirties who wants those tickets, for chrissake, don't hit the reply all button! There is no better or faster way to earn the ridicule of every single one of your colleagues. Yes, that snickering sound you hear is directed at you, my friend.