Although much of the show's satirical, over-the-top humor can be construed as sending messages about irresponsibility, family dysfunction, and more, at their core the Simpson clan are a loving bunch who are always there for each other when the chips are down. Homer and Bart in particular are constantly challenged to "behave," and though they don't always fully succeed, they often learn lessons about self-control and caring for others.
Frequent slapstick and cartoon violence: car crashes, explosions, practical jokes, bullies beating up weaker kids. Characters are rarely injured, but on occasion, some do die and/or require treatment. Halloween specials are particularly violent, with disembodied limbs and heads, blood, and gore. Homer frequently chokes Bart; it's played as a joke.
Innuendo-based humor is pretty frequent. Both subtle and not-so-subtle sexual references pop up. Women can be dressed like vamps.
Language includes words such as "hell," "ass," and "damn." Bart is usually the main offender, though Grandpa Simpson is a dirty dog as well.
Frequent parodies of consumer goods, companies, real celebrities, brands.
Drinking, Drugs & Smoking
Homer often drinks beer to excess. Characters are shown getting pass-out drunk, and many scenes are set in a bar. It's often implied that bus driver Otto gets high. In several instances characters ingest mysterious liquids or foods that send them on psychedelic trips.