id say a tattoo is like putting a sticker on your bass. your bass is a natural body, and it has been modified, by adding a sticker, or a custom paint finish, or anything extra that goes on top.
nobody asks for reliced tattooes, would somebody ask for crappy faded ink like you see on old military guys who got their tattooes on some dock in 1947? isnt that kinda the same thing? getting a tattoo that looks old is the same thing as asking for a bass that looks old.
Tattoos are image statements just like reliced instruments are to some. Neither occurred naturally.