Hope I can contribute, because this is actually very interesting. According to this [1], the most common American pronunciation was closer to "Your anus" (accent on the A in anus) until 1986, when a space probe was flying by and news casters thought weeks of that would get too "giggly", so they deliberately started pronouncing it "Urine us" (accent on the first syllable).
Thank you. That was amusing to read and I never actually realized there was so much about the pronunciation, I've heard a few different ones. but I always took it for regional dialect differences not something done intentionally. I may have sounded sarcastic, but I was genuinely serious, I really do enjoy the interesting factoids spawned by sometimes the most innocuous comments on HN. HN really does have a lot of people knowledgeable about a huge range of things.
[1] https://www.dollarshaveclub.com/content/story/anus-urine-us-...