Why does my eyeliner run?

The reason your eyeliner runs is because there is a liquid that comes out of your pores best known as sweat.Yes you have to drink water to sweat but everything you drink has water in it.So the flavor and the water are separated and the water(sweat) comes out of your pores and make your eyeliner become a water-like substance as it runs down your face/I hope this answered your question!!Thanks!