REASON FOR THE PRONUNCIATION CHANGE:
HISTORICALLY, it WAS pronounced "Your ANUS". In the 1970's a very popular sketch comedy group Ace Trucking Company did a skit about the "Your ANUS" pronunciation, and the joke caught on on college campuses.
The result was that astronomers started using the "URINE us" pronunciation.
Although I've heard the new pronunciation for DECADES, I've never seen ANYONE realize the words it splits into. I have a feeling they didn't realize the implications in the meme title here. (... "golden showers" ...)