In one episode angry kid is curious about the noises his mum and dad where making. And he doesn't know it was sex.

In one episode he watches sex ed

Angry kid makes a sex call in the episode: "Sex Call" He also get's very convinced and asks dad about his and mums strange sexual behavior in the episode: "Curious"

In some episodes fake blood is shown.

In the new episode "Bumfluff" Angry Kid shoots his dad with a nerf gun while he shaves causing dad's "bumfluff" to bleed however we don't see anything

In Ispy he says "cunstubble."

One episode is about swearing, and the Angry Kid says British slang's and global profanity. Words include bugger, bum, shit, fuck, cabbage. The driver of Angry Kid then gets frustrated and says shit. In Backwards Writing, Angry Kid snatches his sister's paper and writes Daddy is a twat in backwards. When Angry Kid is slapped, he writes SHIT on another piece of paper. Tourrettes is where Angry Kid is unable to control his swearing and says profane words in a fast way.

sometimes attack , newpaper get kid etc.

third series is here so expect 3x of this lot