A proper tattoo can instill fear into the hearts of your enemies. Although in this shitty day and age they'll probably shoot you before they get to see it. Still your bar room enemies will be intimidated, and while those are my favorite type of enemy I still don't have a tattoo.
However the tongue ring proved an invaluable artifact for my constantly playing with it in class was what drove my college instructor over the edge and made her make a move on me. There are presidents of the united states and other great men that have never experienced the sublime pleasure of sleeping with their teacher. In that respect I have 1up'd these kings and rulers.