All the time. I view cuss words the same way I view every other word. However, I only cuss around people who I know don't mind cussing as I know some people genuinely can't stand it. And I don't typically cuss around kids because they might pick it up from me and say it at school which could get them in trouble.
Though a cuss word may slip out regardless of who I'm around if I'm upset or get startled.
Like when someone shoots off fireworks a week after July 4th in the middle of a Taco Bell parking lot while I'm trying to hand the drive thru employee my card and we both think it's not fireworks for a split second.