One of the things it's really good for is that whole ribs/belly area. You know that kind of tickling that attacks the muscles under the skin? With oil applied, that's the kind of tickling that's amplified. Instead of placing your fingers over a certain spot (say at the waist) and digging in, you can apply the same pressure and slide them over a larger area without friction. And with the ribs, you can tickle longer without causing pain, which can be surprisingly easy considering the relatively thin skin covering the ribs.