Experts have revealed that previously common swear words are becoming less offensive, showing that the way society thinks about others has changed dramatically over the centuries.
They found that swear words relating to sex and bodily fluids are less shocking and are being replaced with more controversial and offensive words, like "fat."
Words describing people, like their racial background or a disability, are considered more offensive than swear words like "f**k."
The earliest swear words were often used to talk about sex or disrespect something considered sacred, like religion.
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Words like "p*ss" and "sh*t," and other words that describe bodily functions, are now considered less obscene.
"We are no longer as outraged by public discussions of sexuality as we were in the past," Jesse Sheidlower, author of book "The F-word," said.
"So even the sexual uses of the words are not as strong as they used to be, and the non-sexual uses are that much weaker still. However, it is true that the increasing quantity of non-sexual uses has weakened f**k's taboo status further. Most uses of f**k today are non-sexual."
And because society does not take religion seriously anymore, using swear words is less taboo because people believe there won't be consequences to face in the after life.
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"What you can see becoming more taboo are racial slurs, but then also anything that kind of sums someone up," linguist John McWhorter said. "So people are objecting to 'fat'' and especially something I've noticed just in my lifetime is 'retarded.' People and kids on the playground just said it all the time. And now, it's really taboo."