You have a right to say no. Most of us have very weak and flaccid 'no' muscles. We feel guilty for saying no. We get ostracized and challenged for saying no, so we forget it's our choice. Your 'no' muscle has to be built up to get to a place where you can say, 'I don't care if that's what you want. I don't want that. No.'
Iyanla Vanzant
"No" is the faucet that terminates the flow of action and communication..."No" should definitely be used and respected.
Yes. There is nothing wrong with having other opinion or disagreeing