I love to curse it adds meaning to the sentence that your f**king saying lol but anyway when im around people who dont like it i naturally cut out those parts so for example my words will look like this
"So i was in line and this _____ pushed me"
is it normal to cut out cuss words naturally
Informal is where you are talking with your friends and can use all the bad language you want.
Formal is what you would use on a job interview. I would practice talking in formal for a while to get USED to doing it and eventually, you will be quite good and don't need to censor every thought coming out of your mouth.