There's a book for that
How to Talk Yourself Out of …
plastic surgery: The Island of Dr. Moreau by H. G. Wells
tattoos: In the Penal Colony by Franz Kafka
haircuts: Sweeney Todd (multiple authors)
Oooh, let’s make this a thing…
prep school: The Catcher in the Rye by J.D. Salinger
hooking up with exes: The Great Gatsby by F Scott Fitzgerald
holding a grudge: Moby Dick by Herman Melville
marriage: Revolutionary Road by Richard Yates
cheating: Anna Karenina by Leo Tolstoy
manic pixie dream girls: Breakfast At Tiffany’s by Truman Capote
extramarital affairs: The Scarlet Letter by Nathaniel Hawthorne. (See also: Madame Bovary by Gustave Flaubert)
trusting teenagers: Lord of the Flies by William Golding
politics: Julius Caesar by William Shakespeare