Three little rules

Your opinion is valid, I'm saving this comment Incase one day I decided to build an instance I'll create that tag, just for you.. ;)

Blow is short for blowjob.

So rather than blow the house down, the wolf instead goes to town on the chimney.

"blow" = sex
The wolf had sex with the house and flooded it with so much semen that the pigs got blasted out the chimney

...yeah