Does the sound of running water make you need to pee? When you are out with friends, and someone rises from the table and says they will be right back, does it flash across your brain (and bladder) that you need to be excused, too? If you're working in the kitchen, and you have your hands in water, is that when you decide you really need to run for the potty? Does the phone always ring just when you’ve taken your first steps toward the bathroom? If you said "YES!" to any of those things, you're a woman.
Maybe because of the nature of feminine plumbing we have learned early on to be sure to take care of business every chance we get. Most women scope out the restrooms in a mall so that they know how far they are from one if they (or their children) need it. When I was traveling, I'd stop at McDonald's just because they had the cleanest johns (no double entendre intended), and they were likely to be found in almost any town I visited.
Every woman has experienced the situation where you’ve been quietly waiting, thinking that in just two more minutes you'll be able to make a break for the bathroom, and someone or something delays you. Just about that time a waiter will top off your glass of water, and beads of condensation will roll down the glass. Or, you’ll pass through a reception area that has a trickling fountain. Or it will start to rain outside. It's truly unfair that every little thing can remind us of the cup of tea we just drank, or the one too many cups of coffee we had this morning.
Men have always wanted to know why women go to the ladies’ room in packs. All this time they’ve been worried that the women wanted to gossip about them, but it’s really just the power of suggestion.