Adult Jokes We Didn't Get as Kids

Writers of children's shows and movies like to put dirty or mature jokes in thier films or shows to keep the parents enterain while they watch the show or movie with thier kids and while the adults laugh while thinking the joke in that said show or movie because they shocks them, most kids who are watching the show or movie may not get it and may look at thier parents and wonder what's so funny?, while the parents say something like "you understand when you're older", and when the kids get older and rewatched the episode of that current show that had that one adult joke or the movie that the adult joke had when they were 6, they are shocked and also find it funny. Which is why I took a random jokes of random movies and shows for kids we problaury never got as kids, but when we look back as adults, it shocks of. Also, the last one with Grover and the blue guy isn't really an adult joke, but you rewatch that scence as a adult, it looks weird, even though it's not supposed to be.