Tongue Twister Theory 101

"She sells seashells by the seashore."

This tongue twister was in my head when I woke up, idk why, but of course it was stuck on a loop, so “She” was selling seashells throughout my morning ablutions. As it repeated, at some point the tongue twister went from being silly to salient as I studied "She" in this twister. Follow my train of thought:

She is selling seashells by the seashore. Say it out loud so you can catch this thing. SHE IS SELLING SEASHELLS BY THE SEASHORE!