Since you are clearly clueless, I will take some time from my busy day to explain to you something called an INTERSECTION ATTACK, one of the fundamental types of forensics (correlation is another!). Let's say you touch the outside of the envelope and get your fingerprints on it. Now, as you are hopelessly clueless, you incorrectly assume that it doesn't matter because your fingerprints will blend in with the fingerprints of dozens of other people who handle the package. Now when your package is fingerprinted after being intercepted, the detectives find 12 unique prints belonging to 12 different people. Whew, you may say to yourself, I am totally safe! Now, assuming they don't zero in on your prints due to the fact that you have previous drug charges and are not someone who works in mailing, the detectives just wait. Now they intercept another package from you (or they order another package from you, to save themselves some time!). This time they get 20 unique prints! Whew, you may say to yourself, I am totally safe! Except now those clever detectives take the first set of prints and the second set of prints, and they remove all prints that don't show up on both packages (this is an intersection attack!). Oh no, now only your prints are suspect , because none of the original 12 people who handled your first package handled the second package! Now you are totally fucked! You are obviously new to mailing drugs, and my money is on you being busted in no time if you really don't wear gloves. Welcome to forensics 101.