Steven told me this joke the other day. I had forgotten it enough for it to be funny to me again:

A man and a woman are driving down the road, arguing. The woman can't take any more. She pulls a knife out of her pocketbook, cuts his penis off, and throws it out the window.

A father and daughter were driving in the opposite direction. The penis landed on their windshield, where if flapped in the wind for a second or two before blowing off in the wind.

"What was that, Daddy?" the little girl asked.

After an uncomfortable silence, he answered "It was just a bug, dear."

She sat quietly for a second, thinking, before adding:

"It sure had a big dick, didn't it?"