A closer look
Your expensive screen relies entirely on the fact that human beings are essentially giant bags of salty, conductive water. Capacitive touch displays do not actually react to physical pressure, but rather to the microscopic electrical charges constantly flowing across your bare skin. When your fingertip interrupts the invisible electrical grid layered on top of the glass, the processor registers a tap. This is exactly why you look ridiculous swiping furiously at your screen while wearing winter gloves.
