What does pig encourage beans mean?

From: Chocolate Beans, a product, a spoof joke.

It's a joke on you, implying that you are a pig.

Something similar to this is: Today is your birthday, pig, happy birthday to you (happy birthday to you).

I have also invented a similar prank, and I will announce it here, haha, you can use it to fight back:

If there is a smart child, there must be a stupid child. , the smart kid is me, who is the stupid kid? The answer is you, because there is something called: I'm stupid (quail egg)