Experts in the field of Piercing and Tattoo

I would consider the experts in this field to be the actual artists themselves, along with the people who have tattoos and piercings and have taken the time to fully understand the care and procedure that goes along with them. It is hard to say who the authority would be, but in the case of my observations at the tattoo parlor, the head tattoo artist is clearly the most experienced and the one in charge. I would say it is possible for an outsider to be an expert if they have learned all they can about tattoo and piercings but don't personally have any. I however have not encountered anyone like this so far in my research. As far as questions go, I think it would be appropriate to ask after the care of tattoos and piercings, and so on.