Adam's long-term commitment to his parents models a belief that generations should take care of each other. Derelicts who see the fallout shelter elevator transport Adam to the surface start a cult to worship the family. Adam chastises a merchant for taking the Lord's name in vain, and draws stares in a restaurant when he pauses to say grace over his meal. Loose women approach Adam in a swing club where the spotlight shines on some suggestive dancing. Lots of sexual innuendo, anatomical slang and double entendres throughout the film.
Frequent profanity includes a use of the f-word.
There are also several inappropriate uses of God's name. During decades underground, Adam's mother stealthily escapes into alcohol. There's evidence that Eve has cohabitated with boyfriends in addition to living with her gay friend. Moreover, it leaves one with mixed feelings about the romance between Adam and Eve. It's hard to root for them to wind up together because we know Adam's too good for a sullen whiner with no evidence that she's capable of maintaining a healthy relationship.