This response is also great role modeling for others, who also may want a good reason to say no to cannabis. Anyone who pressures you to use cannabis after you give this response isn’t worth listening to. Anyone who pressures an ex-smoker to smoke is obviously lacking in respect and understanding of the harms of smoking and doesn’t deserve your company. This also implies you have good reasons for declining marijuana, but that they are personal, and not open for discussion. If you receive more questioning or pressure to take a toke, simply repeat what you said before, and walk away.