I wonder why society made them bad. Except for f*ck, and sh*t, all those words were comonly used and had no bad meaning.
Hell: a place of eternal firey torment
b*thc: a female god (they still use that word at dog shows :3)
Ass: a donkey or person who is stubborn
the list goes on and on
My point exactly.
stuff - Feces
forget - Possibly the most versatile word in the English language, can mean hundreds of things, but mainly love, which is not inherently vulgar, even though religious zealots and conservative idiots would like to make it out to be.
Then you've got words which are just crude references to genitalia, again, not really being bad in any sort of way.