This video was found on one of the Korean sites. And its pretty hard to describe the feelings you experience when watching this movie. The first question to ask yourself is probably why he uses sausages instead of his fingers? But here is an explanation:

According to the Korean portal Hani.co.kr ^[1] the sausages are the best substitutes of human fingers for iPhone. If your fingers are too sweaty for continual touchscreen use then sausages are the only solution for your problem, because neither gloves nor stylus will work on the capacitive iPhone screen.

We don't know about how many Koreans have sweaty hands, but we have an information that sausage sales in that country increased by 39% over the same period last year. Obviously, the sausages become a usual practice in Korea.