There’s this brilliant app that helps prevent bad tattoos and gives you an idea how it’ll look.
It’s called INKHUNTER!
It’s easy to use, first off (after downloading), draw a ‘smile’ on the part of your body where you want said tattoo (maybe don’t use permanent marker like I did):
upload a design or select one that you like and voila:
Clever. And you don’t end up with tattoos like these: