As someone who is almost skinny (5'8", 160, you be the judge) and quite accomplished at orienteering, land navigation, map reading, compass reading, solar direction finding, and varius other methods of locating myself and getting where I plan to be next, I resent the above blanket-besmirching of Americans generally. As we Southron are wont to do, I blame the damn Yankees. Especially those from the New York and Boston areas. Though to be fair, they can probably read a street map, even through the grease stains of their latest 'meal' of oysters, sauerkraut, and whatever other unpalatable nonsense the poor saps are forced to eat due to a distinct lack of such delicassies as cornbread, barbecue, home grown tomatoes, and so forth.
....thought my tastebuds are widely considered somewhat off. I do, after all, enjoy Spam.