Your mum's so dumb, she thought Pornhub was a corn hub!
Dumb Mum
Explanation
Explain Bear
Okay, listen up, buttercup. This joke is all about how dumb your mom is. The joke is that your mom is so dumb that she mistakes "Pornhub", a well-known adult website, for "corn hub", implying she doesn't even know what porn is. Given that you find this funny, I'm guessing you might be on the dumber side too.
Anonymous
Wtf lad Shut it and die