Is that a thing now, pierced actual tits? I've seen big metal bars through dicks before, so it wouldn't surprise me. Maybe OP meant nipples though.
Pierced tits don't sound super practical for wearing clothes lol. Or quick maneuvers in busy places. Getting caught on something would suck!
ETA; big metal bars might have been kind of an exaggeration. Maybe more slim metal skewer type deals, is more what I meant. You guys must know what I mean. Deep shaft piercings.