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Names in particular are under no obligation to follow established or common spelling or pronunciation patterns. A simple search on the engine of your choosing would’ve told ya that’s the way it is pronounced. It is, of course, unusual. But they’re doing it as close to right as they can for Ralph.
I think you maybe be extrapolating here from too tiny a dataset. Type “tongue out selfie” into the search engine of your choice and be amazed at how many people have written dissertations on the subject. The simplified take is it started with teenage girls and spread from there.