I am currently watching Game of Thrones (no spoilers please) and I've noticed a lot of the characters use words like "fuck" "c*nt" etc. Were these types of words used in medieval times? Did they have the same connotation and denotation as they do now?

I always just believed that they used formal English back then (granted my only exposure to these times is from movies and TV shows). Thanks in advance.

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Side question that I doubt really has an answer, but when were 'foul' words made foul? As in, when did people say "you shouldn't say *swear word*"