Bidets are those devices that spray water (and sometimes air) on your posterior. They are more hygienic than toilet paper, and save you money in the long run. In Japan, high-tech bidets called Washlets are now the most popular electronic equipment being sold — 60% of households have them installed. In Venezuela they are found in approximately 90% of households.
You can actually install a “bidet seat” quite easily, in place of your existing toilet seat. Bidet seats attach to the existing water supply through a double adapter and a hose. Some seats are quite elaborate, featuring jets of heated air, remote controls and various water massage settings.
A while back, we recommended Terry Love’s toilet reviews. He also hosts a good overview of bidets (but no reviews unfortunately). He does recommend the Toto Chloe and the Biobidet however (see this short reply to a reader). I’ve used a very basic $56 Biobidet for a year now and it works fine, if you don’t mind cold water.
There’s also hand-held travel bidets available, and some people prefer to use these at home too.
There’s also a book on bidets available — it explains the advantages of a bidet in detail and has many shopping tips.