Mexicans in general, and men in particular, are nosy about single travelers, especially women. If a taxi driver or anyone else with whom you don't want to become friendly asks about your marital status, family, and so forth, my advice is to make up a set of answers (regardless of the truth): "I'm married, traveling with friends, and I have three children." Saying you are single and traveling alone may send the wrong message. U.S. television -- widely viewed now in Mexico -- has given many Mexican men the image of American single women as being sexually promiscuous. Check out the award-winning website Journeywoman (www.journeywoman.com), a "real-life" women's travel information network where you can sign up for a free e-mail newsletter and get advice on everything from etiquette and dress to safety; or the travel guide Safety and Security for Women Who Travel, by Sheila Swan and Peter Laufer (Travelers' Tales, Inc.), offering common-sense tips on safe travel. In Mexico City, consider riding the women's only bus.