system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why do we have swear words? Who decided they were inappropriate?

edit:Why do they offend you?
gpt
Most "swear words" fall into two categories: sacrilegious and vulgar. One offends God, the other marks you as someone of low standing.

Sacrilegious swears ("God damn it!" "Jesus Christ!") are discouraged by the religion, for that religion's purposes (Thou shalt not take the Lord's name in vain).

Vulgar swears ("shit", "piss", "asshole", "fuck", etc.) are frowned upon because it is generally considered impolite to discuss bodily functions in public, and all of these words refer to bodily or sexual function.  This is compounded by the fact that these are often terms used by lower (often poor and/or uneducated) classes, so their use is discouraged to prevent one from appearing to be of low social class. Farmers "fuck", aristocrats "make love"; laborers "shit", lawyers "excuse themselves".

It is a way of the wealthy/educated/powerful in a society to separate themselves from the poor/uneducated/powerless by using a different vocabulary.