" Interestingly, No can attract more help if you are being attacked than even the word help. So say the trainers at Impact Bay Area, the organization that trains women in self-defense. Shouting “No!” attracts the attention of others naturally and recruits any help that may be available in earshot. Equally important, the trainers say, “saying No is a way for you to communicate with yourself. It forces you to breathe, which breaks the freeze response. It gathers your energy. It gets your adrenaline going. It reminds you of the [self-defense] class, your muscle memory, the support of the line [your peers], and the fact that you have the right to fight for your own safety. Most attackers are looking for easy victims. They’re not looking for a fight, not even a verbal one. Saying No makes you a less attractive target. Submitting and being nice to attackers in the hope that they will be nice to you in return is not the safest strategy.” Saying “No!” helps you gather your energy, reminds you of your right to say No, draws attention, and expresses your power. "

― William Ury , The Power of a Positive No: How to Say No and Still Get to Yes