You've been chatting with someone online, and now he (or she) wants your phone number. What do you do? Always err on the side of caution and never give out your phone number unless you can say a very confident "yes" to the following questions: Do I know this person very well? Do I trust this person? Do I have absolutely no reservations? Am I confident this person is who he or she says they are? Am I totally comfortable giving out my phone number? Only if you can answer all questions positively and without hesitation should the number be exchanged.