Should be rated PG13
Alcohol/Drugs: A bit of Drinking Sex: No activity or nudity, some frank talk but not particularly explicit. Violence: A scuffle, fairly slapstick in nature. Profanity: None of the usual F and S bombs, some sexual talk as mentioned under sex.
Point: Hard to imagine what the MPAA saw to give this an R rating (or what their UK counterparts saw to give it a 15. Granted it's not likely to appeal to kids or teens but nothing here that they need to be protected from or haven't seen much worse. Also the lack of strong language robs the film of some authenticity. Alvin seems to be the sort of character who might avoid swearing but the same can't be said for Lance. I would imagine someone of that character in the situations he finds himself in to be swearing like a trooper. Perhaps this movie was intended by the makers to be a PG13 but the prudes at the MPAA balked at a bit of sex talk.