I shave my legs and armpits if I left it grow for a long while will it keep growing back or eventually stop?

ANDY'S ANSWER: Your leg and underarm hair will grow back if you stop shaving, just as your head hair would grow back. Will it keep growing longer and longer like your head hair? No. Leg and underarm hair has its own genetic makeup from the hair on your head which has been predetermined how long it will grow and how long it will stay on your body before it is replaced by a new hair.