Body Peircing and Tatoos.

I missed the lecture for this subject unfortunately. However, neither of these to me are bad or antisocial behaviours. Unless you tattoo pornographic or controversial images onto your body, these are just forms of expression, the only person you harm is yourself.
I believe some tatoos are a mistake. When you are young a tattoo can look good but as you get older and your skin ages, they can look quite unattractive.