A Tattoo is a picture that is created by the application of ink to a lower level of non-ex foliating skin.
A tattoo, whilst considered bogan or trashy, is much more interesting than plain skin. Anything drawn on a blank canvas is more interesting, and warrants more thought, than a blank canvas.
Speaker 1: Oh when you get old you'll get all wrinkly and that tattoo will look gross.
Speaker 2: When i get old and wrinkly it won't matter that my tattoo looks gross, because my whole body will look gross.