A blonde mom is cooking dinner when her blonde daughter walks in.
The daughter asks, “Mom, why do people think we blondes are stupid?”
Her mother replies, “I’ll show you”, and taps hard on the kitchen counter.
Somewhat confused, the blonde daughter says, “Someone’s at the door!”.
The blonde mother laughs. “This is why people think we’re stupid. Now watch over the stove for me while I answer the door.”