I, like many other people, hate nail clippings so when you see someone licking a box full of them it just makes you cringe. If you really must there are more pictures of him licking the nails and close-up shots of the 20-year-old clippings. Here's what it says on his site about his collection.
My nail collection began in 1983. Since then, it has been spilled 3 times. Each time, I managed to save about 80% of the collection. It was lost in my basement for about 2 years as well. I have been very careful not to allow others to contribute to the collection. It contains both toe and finger nails. Once, when I licked the nails, I made a girl in my college drama class cry.