How would you like a tracking device in your breast?

I have to research random stuff for my work, and this week, I have been learning about breast implants. I was just reading through some general information, and I came across a very casual reference to a certain company embedding microchips into their breast implants. Apparently, the chips contain the patient's medical history and can also be tracked.

And my thought is... Why ON EARTH would you want a microchip that could track you implanted into your breast!? What could you possibly believe to be the advantage of having a tracking device literally implanted into you? Has the world become a freaky sci-fi reality in which people actually don't care about their privacy in the slightest bit? It's one thing to post almost everything you do on Facebook—it's another to have all of your actions trackable by... of all people... your breast implant company....! Is it just me, or is this totally wild?

And why are the breast implant people tracking their consumers, anyway? Are they keeping track of the best vacation spots for people with implants? I don't see how anything you do besides buy their implants is any of their business.