In which we naturally look up the dirty words first and learn that: we've been saying kiss my ass for 300 years; those wacky Victorians coined flying fuck as slang for having sex on horseback; irritating little shits have long walked among us; but the assholes and jerks don't show up until right after Prohibition is lifted, coincidentally -- or not? Enjoy, monkeys.
Online Etymological Dictionary. "It is often forgotten that (dictionaries) are artificial repositories, put together well after the languages they define. The roots of language are irrational and of a magical nature."