Cleaning People's Nail

I like cleaning people's hand nail. It must be weird for several people. My "weird" hobby began since I was child. I used to clean my family's nail. But only my family's. If I see them with the dirty nail, spontaneous, I reach their hand and then clean it. Though they are holding something. I just don't like seeing dirty nail. That means the owner of the nail is sordid. The other reason why I like cleaning nail is because dirty nail can cause many disease. There is a lot of germs and bactery in dirty nail.