Dirty yet funny joke

A man and a woman were driving down the road and arguing about his deplorable infidelity when suddenly the woman reaches over and slices the man's penis off. Angrily, she tosses it out the car window.
Driving behind the couple is a man and his 9-year-old daughter. The little girl is just chatting away at her father when all of a sudden the penis smacks the car on the windshield, sticks for a moment, then flies off. Surprised, the daughter asks her father, "Daddy, what the heck was that?"
Not wanting to expose his little girl to anything sexual at such a young age, the father replies, "It was only a bug, honey."
The daughter sits with a confused look on her face, and after a few minutes she says, "Sure had a big dick, didn't it?"

-Courtisy of ebaums world