In my house growing up, any swearing at all, you got your mouth washed out with soap, usually palmolive bar soap, but if you used the F word, it got washed out with lava soap. Luckily, I learned from watching my brothers as I am the baby. They got the soap and I never used sear words. Did not start until I was over 20. Try very hard not to use the F word.
I do notice my kids swearing a little, but then again, it's usually repeating some things I say and they never say it to the adults, only me. If it's something I said previously, I don't get onto them.
Mostly, it's about MIL.