Common Sense Note
Parents need to know that The DUFF is a funny, fascinating -- if quite racy -- examination of the American high school social hierarchy. Sexual themes permeate the movie; there's frank conversation about what types of people are attractive and what types aren't, especially when it comes to girls (the movie's title is short for "designated ugly fat friend"). Teen characters drink, fool around, talk about sex, and swear (including "d--k," "bitch," "s--t," and one "f--k"), and the humor and references can be crude (boys talk about "banging" girls, etc.). There's also a cruel incident of cyberbullying and lots of product placement. Stereotypes typical of high school movies are somewhat upended (some popular characters are kind and sensitive, etc.), and the main character learns that it's important to define yourself rather than letting others label you, but there's also an underlying theme about having to change who you are to succeed in romance.
Sexual
Content
Sex-related themes permeate the movie. Crude jokes/references right off the bat include talk about what boys would like to do to girls ("banging," etc.). Teen couples also kiss/make out, sometimes passionately, and imagine/allude to having sex, but no graphic nudity. Teen boys are seen in the locker room half-naked; a girl is shown in her bra. Other revealing outfits, including a glimpse of a girl's underwear. References to porn/daydream that plays out like a porn scenario (not graphic). A girl acts suggestively with a store mannequin. Suggestive song lyrics.
Violence
Some shouting matches, plus cyberbullying: A vindictive girl makes a compromising video about a classmate go viral just to hurt her.
Language
Frequent strong language includes "s--t," "ass," "jerk," "bitch," and one "f--k."
Social
Behavior
Nobody has the right to label you; you get to define yourself. And it's not healthy or productive to compare yourself to others. But there's also an underlying theme about needing to change who you are in order to get the object of your affection to notice (and have sex with) you, and appearance is definitely part of the equation. The whole concept of DUFFs (designated ugly fat friends) is cruel, but that's alleviated by the movie's ultimately uplifting tone.
Consumerism
Lots of products/labels seen and mentioned, including Facebook, Instagram, Twitter, Hyundai, BMW, MAC, Lacoste, Zara, Brookstone, Beats by Dre, Apple, iPhone, Nike, Dave and Busters, Motel 6, Vine, Tumblr, Snaphat, and YouTube.
Drugs / Tobacco /
Alcohol
Teens are shown holding Solo cups at parties, presumably filled with alcoholic beverages.