I know, right? Like, putting aside the whole eugenics thing ("we want a child whose eggs have high SAT scores! we want a child whose teeth were good! we want a child with brown hair!" etc) the tattoos and piercings should have nothing to do with any of it. The only reason I can think of to justify them asking is because for a while after getting tattoos and piercings you are ineligible for blood donation as you may have contracted an illness from a dirty needle, however this website is asking me to detail each, which is coming up at like, 10ish entries. And that's annoying.
Do they want you to describe what they are? That might be some sort of personality thing or maybe they're looking to weed out like skynbirds or something.
I think I am going to email/text the lady and ask. They have tried very hard to be very reachable through this process, I think they must experience a lot of attrition/applicants who do not complete the process. I am trying to think if this is the kind of the thing I want to/should tell my parents I am doing or not. I don't think they would really understand or necessarily be very supportive, idk. I'm not quite sure how they would react.