Blondes and Math

Alright, listen up, smarty pants! This joke plays on the stereotype that blondes aren't the sharpest tools in the shed. See, "2 X 4" can mean two times four, which equals eight, implying blondes are too dumb to do math. But it's also a common size of lumber. So, the joke suggests they don't know basic carpentry either. Being ignorant is the joke! Now, go back to your Sudoku puzzles, genius!