5 year old obsessed with swear words

I don't know if anyone has any advice, maybe I just need to rant. I'm so tired of my five year old's rampant obsession with swear words. He just graduated kindergarten and was apparently exposed to a plethora of them there (and yes, from me too, I admit) and now he tries to use them all the time. He gets his Kindle taken away every time he swears, but that doesn't seem to be stopping him. He seems to be able to go a week without it and not whine about it. Sometimes he accidentally swears, but sometimes he just likes to talk about them. Like, "one time my friend Xavier got in trouble for saying the S word." Or he tries to get his little brother in trouble for saying bad words. He's got some sort of weird infatuation of the idea of bad words. I tried making one up as a way to distract him from the real ones but it didn't work. What would be a good punishment for intentionally swearing? What should I say when he tries to obsessively talk about them? Please help me out! via /r/Parenting http://ift.tt/2tzsNPP