Chances are, most matching tattoos that you’ve seen belong to couples. Couples tattoos encompass all the qualities and symbols that are personal to lovers, an intimate ink language that only they know. While there are countless options for matching couples tattoos, the final choice ultimately lies within their relationship. What emblems, animals, and quotes best sum up their feelings as well as shared values and interests? Maybe there’s a particular date or occasion they want to commemorate, or perhaps an inside joke? Whatever two soulmates select, it’s their little secret.

Matching tattoos are also popular among best friends who want to prove to the world that their bond is forever. In fact, even stars like Kylie Jenner and her BFF Jordyn Woods got red “M” initials on their pinky fingers. What the letter stands for is still unknown to the general public, but true friends keep each other’s secrets. Instead of buying all those material things, BFFs who choose to get something permanent are showing that whatever happens, they will always be in each other’s heart.

For certain families out there, there’s just nothing better than having an older or younger sibling. Sure, you get into big fights sometimes and maybe they get so out of control, you wish that you could trade them away, but deep down inside, the connection that you have with your brother or a sister isn’t like any other. It’s one of a kind. It’s permanent. And what better way is there to show exactly how much you love and appreciate your relationship than doing something that’s also very painful and permanent?