This girl really wants to borrow her dad's car so she can go out with her boyfriend.
"Daddy, can I borrow the car tonight? I have a date."
He says "Sweetie, you know the rules, if you want to borrow the car you know what you need to do!" She says, "No, Dad, that's sick!" and walks away.
She comes back about an hour later. She caves and decides to do the deed cuz she really wants to see her boyfriend. She gets on her knees in front of him and starts the job. Then she stops suddenly and grimaces.
"Ugh, Dammit Dad, your d**ck taste like sh**t!!!"
Dad laughs and slaps his forehead, "Oh yeah, I forgot, your brother came by right after you left to borrow the car!"