How Supergirl managed to get her ear pierced?

Per my answer on SFF:SE to the same question;

According to the show's producer Ali Adler (via twitter), Kara got her ears pierced on Krypton. This clearly fails to explain why she doesn't appear to have pierced ears in the escape pod (!!!) but I guess that's as good an explanation as any.

#supergirl #eastcoastfeed @supergirlcbs for all of you wondering, Kara got her ears pierced on Krypton— Ali Adler (@AliAdler) November 10, 2015

My initial thought was that whilst Kryptonians are generally unable to be pierced by normal means, they can pierce themselves (at least as seen in the various comic series).

Using Super-Heat-Vision

By simply tearing their own skin.

It follows that assuming Kara isn't wearing clip-ons(!), she could have pierced her own ears (perhaps with a fingernail) or simply by using a directed beam of her heat-vision.

Supergirl comes to Earth already grown. She's not a baby like Superman is. So she could have had her ears pierced on Krypton before long before she came to Earth.

Just to cite another solution: In an issue that involved surgery on Superman, they used lasers passed through a rare variety of Kryptonite crstals, which somehow made them able to cut him -- then retconned that in a hurry before criminals could try it. Maybe Supergirl had her ears pierced during the brief period when that worked.

Or perhaps she or otherwise deliberately weakened herself with some form of kryptonite long enough to do this. People do unhealthier things to themselves in pursuit of their idealized body image.

Or maybe she found someone who could do it with high-powered magic, which I believe they are at least partly vulnerable to.

Given that nobody has ever explained how you build a Superman out of the same things the rest of us are eating, or how his own cells manage leanup and replacement, or a million other inconsistencies, this one is relatively easy to explain away.

Unstoppable force meets immovable object, writer goes into hiding.