According to Wikipedia,
"Fuck has become increasingly less vulgar and more publicly acceptable, an example of the "dysphemism treadmill", wherein vulgarities become inoffensive and commonplace."
Thank you Ethel, I have learned a new expression today. I rather like dyphemism treadmill and shall store it up for future use.
Try not to worry about these things. The words themselves don't really matter, it's the intent with which they are spoken that is important.
Having said that, if the C-word, which according to Wiki is the most offensive word in the English language, became subject to the dysphemism treadmill, even I might feel that was a step too far.