> Are these people so upset by the word that their brains fail to parse it when one vowel is obscured?

I used to date a girl who did not like swearing. She would correct me if I used fuck or some other swear word. It's not that she was a prude; she was quite adventurous in bed and the sex was great, but she just had a problem with these words. Knowing that someone like her could be a reader of what I'm writing, I'd disguise the word.

Think of it like a weaker form of rot-13 encoding...