A guy and a girl are having sex when they both say, "I'm really hungry and thirsty too. It was freakin' freezing in the house so they both have an argument over who should go get the food and drink.
After a while they decide to have a contest. Whoever can come up with the best poem would be the one to stay in bed.
They both think for a while when the guy says, "Okay, I got one. Two times two is four plus five is nine, I can pee in yours but you can't pee in mine".
So she thinks for a minute and says, "Okay two times two is four plus five is nine, I know the length of yours but you'll never know the depth of mine."