There are parts of your body (or at least mine) that are not routinely displayed to the public. The roof of the mouth is an example. Indy Voet, a Belgian tattoo artist, has been inking tattoos in that remote location for five years. He tells Inked magazine that it's a tricky job that requires delicate handwork and a trusting client:
For this process, Voet uses a handpoking technique rather than a machine, explaining that the machine would be too harsh on this location and too difficult to get to. "I don't really use anything other than a needle and some dexterity, combined with the trust of my client."
Thankfully, it doesn't hurt too much to get tattooed on the roof of the mouth:
"Nine out of 10 people describe these tattoos as being almost painless or at least, very easy to handle. The other 10% mostly complain about jaw muscle aches, which seems logical."
-via Nag on the Lake