Seen this so many times but I don't know what it means

Usually I’m pretty good but this one stumped me

People were saying it’s from Futurama. I’ve never watched it. Please help Peter.

Petah, What’s next month?

Is it the apocalypse?

Peter Griffin, explain this to me

What’s so special about the 30 trillionth SpongeBob

Peter

I'm not used to the English side of Facebook, I know it's full of boomers but I don't know if the joke is a "That's relatable, I agree" type of joke or something else.

Bait or mental retardation? Bitch your the retarded one who doesn’t explain the joke.

Petah what is this referencing

I want to see how this would be explained...

Can someone explain this to me? Sent from the guy I’ve been seeing. I’m female.