Dear Abby: Why is the F-word now used so casually?

Dear Abby: When did it become OK to use the F-word? I’m a mother, grandmother and great-grandmother who was born in the ’60s. When I was growing up, it wasn’t done, at least in polite circles. I never heard parents say it in front of their children, nor coaches for Little League teams and high school teams. Now I hear it all the time! I don’t say it because I believe I can get my point across without having to use it. But now it is used in normal conversation.