Petah help, Is the joke just that OP thinks its bad?

Peter please explain whats going on here.

Petah

Petahhhh I don’t get it

What about it?

What does this young man do?

What am I missing here Petah?

I need help Petah

Peter I don’t get it

Petah, does it have something to do with Chinese zodiac signs?

Peter I'm confused

Peter Piper picked a peck of pickled peppers, A peck of pickled peppers Peter Piper picked; If Peter Piper picked a peck of pickled peppers, Where’s the peck of pickled peppers Peter Piper picked?

Petah