The concept of this conundrum occurred to me years ago when I developed a friendship with a woman who had been deaf since birth. I don't remember what triggered it exactly, but I remember thinking exactly this, "If she's never heard herself speak, then what does her internal monologue sound like? Oh, wait... she's never heard anyone speak, so... <brain melts>".

Similar to the author of the piece, I just have to stop thinking about it every time it pops back into my brain. It's like I get into some recursive loop and eventually blow the stack, unwind the stack trace, abort, and resume my regularly scheduled processes.