If you are going to invest in a hobby like stamp collecting, it only makes sense to take care of it. One of the worst things you could do when sorting and handling your stamps is to use your bare hands and fingers. Even if you wash your hands properly, you still risk transferring oils from your skin to your stamps. It may not seem like such a big deal, I mean, most stamps have been handled at some point, right? However, you may not feel the same if you leave a big, nasty fingerprint on a valuable stamp.