1. facts about teeth and dental care
   how long to brush
2. the history of the toothbrush

It's widely acknowledged that everyone -- even children -- should brush for two minutes at least twice per day. Of course, most of us brush for far less than that, but new electric toothbrushes have wireless technology that tells you how long you've been at it and when it's time to stop.

1. how much water people use
   the spread of germs
2. both of the above

Automatic faucets aren't just for public restrooms anymore. People are installing these in their homes to cut down water use and the spread of germs.

1. German origin
   French origin
2. Spanish origin

"Bidet" is a French word for "pony." We know; toilet alternatives and ponies aren't very relatable, but the word is supposed to be instructive. People are supposed to "ride" a bidet in the same way they'd ride a pony.

1. conserve water
   look cool
2. last a long time

Dual-flush toilets handle solids and liquids differently in order to cut down on water use when flushing.

1. two gallons
   five gallons
2. seven gallons

Older toilets can use up to seven gallons of water per flush, but federal law now requires that new homes come with low-flow models that use less than two gallons per flush.

1. more than 500
   less than 5,000
2. more than 6,000

Composting toilets recycle human waste without using water and can save more than 6,000 gallons of water per year.

1. televisions with shiny surfaces
   mirrors with televisions embedded in them
2. neither

These high-tech mirrors allow you to watch television while you get ready in the bathroom. When they're on, a TV image appears in a section of the glass, and when they're off they look like regular mirrors.

1. water temperature
   water pressure
2. both of the above

Some high-tech showers come with a control panel that allows you to create personalized settings for water temperature and pressure.

1. UV light
   cold air
2. sound waves

Toothbrush sanitizers use UV light to kill the germs that linger on toothbrushes. Manufacturers claim that these sanitizers kill 99.9 percent of germs.

1. vibrating
   playing music
2. screaming

The newest high-tech toilets play music when they're in use. The preset tunes are mellow and atmospheric, but if you want to rock on the pot, you can do that, too, as some of these commodes have MP3 inputs.