Damged CPU

hi again..you may believe that i am annoying you with my questions but i wanna know really if this forum is reliable. i have seen that my own CPU isn't reliable. The law states that a CPU will be liable to take all damage instead of damaging any external peripheral device that you connect to it. in other words i mean that if i have connected a USB pen to my CPU, if ever there's an unexpected problem, the CPU will automatically let itself get damaged instead of damaging the USB pen...again i love these three words man wft!!!?!!?!??! why lose a pc just for a cheap usb pen...what's the logic behind it???

good answers-graded to 90 to 100 percent and lower oh god...go to hell!!!