How else do you think my belly and specifically the belly button remain so smooth and silky? Well, I need to regularly and dutifully pamper it with plenty of oil, lots and lots of it. Besides, and oily and slippery belly button is so much easier to manipulate as try to pull it out into an outie as closely as I can. Don't you just love how shiny and velvety my oily little belly button looks in the light? So smooth, so shiny...