5. Calculations for Undergarments

Girl Math: Bring twice as much underwear as the number of days you have off.
When traveling on vacation, one of the most frequent mistakes made by girls is to overpack, particularly when it comes to undergarments. For example, it is imperative that a girl bring at least 14 sets of panties if she is going on a seven-day trip. It doesn’t matter if she wants to wear panties occasionally or change her underwear twice a day—the rationale is all in the word “girl math.”