My older brother who is a prudish die-hard JW and his just-as-prudish JW wife got bent way out of shape because, while at a gathering at a couple's house, I made a comment about their dog's nipples. You would've thought that I said the F-word. I asked, "What's wrong?". My brother responded, "You said 'nipple'".
I asked him, "Since when is nipple a bad word?". He and his wife covered their ears and made sounds to drown out the word 'nipple'. "Argh! NO! You said it again. Stop saying 'nipple'!".
At that moment, I realized he was a lost cause.
PS: He was about 35 years old at the time.