I was thinking back to when I was a young child, and I used to fly in between Europe and the U.S. quite often. One of the routes I flew a lot was from EDDM-KORD on Lufty and United (with the good old Battleship livery). Unfortunately I do not remember that well what type of aircraft I flew because I was only 4 yrs old or so, but one thing I remember was that there were bathrooms downstairs, which I always figured was a B744 then, because that is a double decker. After discussing with my non avGeek father (well he kinda is), he would always tell me that is was an A346, but I would always say a B744. Well, after some research, I have found out that it turns out the Lufty A346 has bathrooms downstairs!
Pretty neat feature, eh?