Not counting strong profanity. Also, I'm going to rewatch every episode.
1. Space Monkey - TV-14-L (Original rating)/TV-14 (Current rating) - One use of "shit" isn't an L.
2. Knob at Night - TV-MA (Original rating)/TV-14-DL (Current rating) - Originally for jokes about dicks, but it's not enough.
3. Charity - TV-14
4. Dolphins - TV-14-L (Original rating)/TV-14 (Current rating)
5. Glass Houses - TV-14
6. Cobblers - TV-PG-DL - A D for Ricky and Stephan mentioning the "knob at night" joke.
7. The Diary - TV-14-L
8. Nuts - TV-14
9. The Jockey - TV-PG
10. The Fight - TV-14
11. Beetles - TV-PG-DLS
12. Noises - TV-14
13. Freaks - TV-14 - For mentions of "knobs".