Office scene where everyone is complimenting each other on their yellowing teeth: "have you been yellowing?" other "ya, thanks for noticing", "what are you using for that" other "mostly coffee, some wine". A woman walks by, she smiles and has beautiful white teeth, the two people talking return her smile, then snicker as she passes "ugh, I bet her breath is fresh as well", "maybe she doesn't notice".
She definitely notices, that's why she uses Crest Whitestrips, she prefers whitening.