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Polyethylene oxide is the green or blue stuff on that little glide strip on your disposable razor—you know, the stuff that makes your face/legs/whatever all slidey but runs out way too quickly? Well, the reason it runs out so quickly is also the reason it's so slippery—the long molecules that make up polyethylene oxide get all tangled on the micro-scale. So when a little bit gets on your face, it brings the rest of it off the strip. The same thing happens with way more mind-bending results when you start to pour the stuff out of a container: the goopy slime grabs the molecules behind it and sucks the rest of the goo right out of the jar against the laws of gravity.