Cell phone pic: Spray me?

So this is what stares at you in all bathrooms as you sit to take care of business. As you can see this on has a slight drip which totally bugs me cause it gets the floor wet and I hate bathrooms with wet floors even if I now it is just water. So as an american this is a foreign device while on a toilet but I guess your supposed to spray your backside when done (some bathrooms have no paper), but if you spray one you'll soon find out it rockets out. I can only imagine using it and getting more than just what I intended wet. I'm sure there is a science to it but I will leave that to others.