Thought provoking. I don't have tattoos but have dated men with tattoos. I think chemistry has a lot to do with it.
I happen to have a tattoo on my right hand, it is there not because of chemistry, just wanted to do something much crazy in my life that doesn't affect my health like smoking and drinking. What matters though is hygiene, wash hands, wearing gloves, using clean and sterilized equipments. the only disadvantage is that it never comes out.