Unsurprisingly the same study found that thumb usage was highest in Japan, a county with a long love affair with technology where young people refer to themselves as "oya yubi seda," the thumb generation. However, what is surprising is that certain traditional actions related to the fingers are now being carried out by the thumb. Japanese kids will now often use ther thumb to ring doorbells and to point a things, although the study doesn't show if they now use their fingers to give the thumbs up signl