I think there's a point on the "Weird Shit Kids Do" spectrum after which the parents stop questioning it and just establish it as routine if necessary.

I used to be fascinated by disappearing coin tricks. I never could get the hang of gracefully making them reappear, because my brain logiked its way to "the only possible, scientifically proven way to make a coin disappear is to swallow it, of course."

At first, my folks were a bit baffled by this, especially considering that I did, indeed, present it as a magic trick every time, and secondly because, yes, it happened repeatedly. But after the second occurrence (from what I can remember, I was 3-4 years old), they just incorporated the routine of waiting for the coin to... uuh... show up again.

It went so far as to not even question why I would swallow all of my grandma's heart pills (which I didn't, I just cleared them of their sugar coating, then fed them to the nearest potted plant I could find), they just casually took me to the ER to have my stomach flushed. No questions, no discussions afterwards, "our kid likes swallowing stuff he really shouldn't, what's the point in questioning, just be ready with that esophageal hose."

And I didn't even have an oral fixation, I just liked magic tricks and sugar...