Teens will want to see this movie because it's raunchy and gross. But like the original, the gross and raunchy moments, though frequent, are less important than the movie's core sensibility, which is sweetly old-fashioned. Let's be very clear: It very, very, raunchy, and very, very, gross, with references to every kind of humiliation, sexual act, and bodily function. No one will call it wholesome. However, in the end, almost every sexual encounter is in a context of respect and sincere affection.
This is not a particularly good movie, but it is not a particularly bad one, either. It deserves some credit for treating its female characters like real people comfortable with their own sexuality, practically revolutionary for movies of this genre, and for completely avoiding the usual sitcom-style painfully artificial mix-ups and misunderstandings. And there are some very funny moments, especially those featuring Eugene Levy as Jim's magnificently unhip but understanding and loving father.