Mister W - nope, it's perfectly fine in both ears.... I actually think it stems from walking to school with the same person, on the same side for years and years.... Got awkward once when I went on a date with a very polite guy who tried to insist on walking on the side nearest the road, on my left... I'd subtly tried to get over to the other side and he moved me back over so I had to have 'the chat' about my weird thing.... Not a good first impression!!