peetah help

Peter, can you explain the therapist part and Stewie and also why they're afraid? I know the song by them but nothing else makes sense.

Petah

I don’t get it

Peter, Is the Story Out of Order? Is It Backwards, And He Dies At The End?

Petah

What does the third one mean?

What does this mean??

Peter, I don't understand

Peetah, What is the joke here?

Petah I used to understand this meme but I forgot what it meant

Petah, Please Explain the Joke