I've been watching the Amazing World of Gumball as a kid, watching some sus moments and not realizing, but since I'm old, I know what those moments mean by that.
I've never watched the show, but others like Victorious, Drake & Josh, iCarly, and Zoey 101 have many innuendos that initially went over my head. And let's not forget the G-rated movie "Cars".
The MPAA lets animated movies off easy compared to live-action movies. It could be worse. Watch some live-action G-rated movies from the late 1960s to early 1970s. You'll really be surprised at what G-rated movies could include back then.