Bidets vary all over the world but the concept is confusing to many travelers who haven’t seen one before. When I posted the video, how to use a squat toilet, Maggie asked me to post a video on how to use a bidet and this is a pretty good one that covers the basics.
There are many bidet setups all over the world (mostly in Europe and Asia) and Gourmantic has a nice wrap up of some when you’ve got to go. Essentially a bidets are used to clean your backside, genitalia, and not for drinking, washing your face or brushing your teeth.