Blonde ambition

A blonde needs extra income, so she's out looking for part-time work. She knocks on the door and a man answers. She asks if he has anything she can do to earn some extra money. He tells her she can paint his porch and he will give her $35. She agrees and he gives her the paint and a big brush. Two hours later, she knocks on the door and tells the man she is finished paining his porch. He pays her $35. She leaves.

She pauses and turns back to face the man and says

"By the way, mister, that's a Jaguar, not a Porsche."