I suspect pron is often discovered by typographical accident. ;-)
Best one I've ever heard was a technical writer colleague of mine in the mid/late 1990s, back when the interwebs was bright and new and shiny, like some uncharted New World. This cat was in his mid forties, and he wanted to buy his toddler nephew a teddy bear for his birthday. So he goes into the Google, enters "bear" as a search term, and gets an illustrated education about what it means to be a "bear" in the, um, homosexual community.