Why does orange juice taste bad after you brush your teeth?
We humans have clearly identified tastes that go great together. The combination of chocolate and peanut butter comes to mind, as does peanut butter and jelly. But anyone who has ever taken a gulp of orange juice immediately after brushing his or her teeth knows that the ensuing taste may be the worst a person can possibly experience.
Why do orange juice and toothpaste taste so awful together? Will it help if you switch to a new flavor? And why does toothpaste foam like that?
Full article at HowStuffWorks.com.
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