So many parents swear in front of their kids that it's to be expected. I personally didn't start swearing til 8th grade, but even then it was very rare. It continued with that rareness untill Sophomore year. Then it became more common, but could still be considered uncommon. I never just swear for the fun of it. Usually only if I'm really mad. It shows people how mad I am. They probably think, 'Wow, he never swears, he must be really pissed right now.'