It's been many a year since an ad mentioned Belching. You'd think they'd say the word all the time in ads today; they seem to have no particular compunction about rudeness, and the word has an inherent comic value.

What are the forgotten 60? Those were the surfaces between the teeth, the ones you couldn't get to with regular brishing. You needed foaming tooth powder! Now with caustic acid, specially borated and isolonicalized!