basic pez etiquette:

if someone offers you a pez, check to see if the dispenser's been pulled back, revealing the candy. if it has, you are obliged to take the candy. do so graciously, even if it's one of the gross yellow ones or if you just plain don't like pez candies. if the latter's the case, you say, 'just one, thanks.' if the dispenser hasn't yet been pulled back, and you don't want a pez candy, it's safe to refuse. just don't make the pez offerer have to push the candy back into the dispenser. that's just rude. the best response is, 'why, i'd love a pez.' i mean, seriously. unless you're actually diabetic, a single pez candy isn't gonna kill you.