Never use naughtiness in mixed company, unless your witticism is so funny that your audience will shoot tears of happiness out of their eyes with a velocity sufficient to power-wash a small bus. Any joke that falls short of that standard will make you lose respect in the eyes of everyone except your best friends, who, as you know, lost respect for you long ago.

The Joy of Work: Dilbert's Guide to Finding Happiness at the Expense of Your Co-Workers