The Japanese have a reputation for inventing new technology and exporting it to the rest of the world. But as Christopher Hogg discovers at a Tokyo beauty salon, there are some things in Japan which may not be to everyone's tastes. I was always taught not to put anything in my ear smaller than my little finger. Twizzling cotton buds around the inside of my ear canal could cause damage. So I just did not bother to use them or in fact to pay much attention to what kind of condition my ears were in. That might be the reason...