I've been seeing a lot of people utilizing ULI's lately for girth work so I took a look at them but am still having trouble grasping the entire concept. So I've d/l videos and looked at picture demonstrations, but to me it looks like a really tight dry jelq where you go back and forth at the point where you cannot push forward with your "finger ring" anymore. Is this the correct method ?
Thanks in advance!

Thanks in advance!