Probably the arm. Any place where there is a lot of fat and fewer nerve endings.
you can get indian national emblem tattooed, no problem with that. I have already got it. but condition is it should be on your upper part of body.
epidermis
there is no 3rd part of human body shich are not painful only two parts hair and niles
The least body part of a dinosaur to be likely as a fossil are the muscles.
Your hair.
Brain
A sting to any part of the body can be painful, but stings to the face or neck can be particularly troublesome -- not so much with the pain, but any swelling can cause more problems than on other parts of the body.
The least sensitive body part is often considered to be the palms of the hands and the soles of the feet. This is because they have a thicker layer of skin and fewer nerve endings compared to other parts of the body.
foot and hand
people who had a tragic accident or cut a body part open and it got infected. very painful and can be life threatening
To the Best of my knowledge I don't think there is a law about that. I believe it is the artist's preference. I know people who won't tattoo fingers, feet, and the inside of mouths. Same thing with piercings.
Well, movement against barbed wire can result in moderate to severe to the skin, depending on which part of your body and the barbed wire configuration. So it may will be painful if you don't get cautious approaching one.