No Sense - of direction

I have no sense of direction. But it appears one of my fellow co. workers "idiots?" is worse than me. Today he has to make a delivery and he keeps telling me the route he's going to take. Even I who doesn't know my left from my right, my up from my down, and forget north east south west, knows what he's telling me is the wrong way.BUT I can't make him understand he's going the WRONG  way!!