 Never step in quicksand. That bit of advice may seem obvious, but it's not always easy to follow. In nature, quicksand is hard to spot. It looks like regular soil, but it behaves like a liquid. That's why if you stand on it, you sink. And the further into it you go, the harder it is to get out. Quicksand is just as dangerous in modern society, only it takes the form of things like excessive gambling, drug and alcohol abuse, or pornography.