"Talking Frog" joke

One day, while walking home from school, young Billy heard a frog call out to him, "If you kiss me, I'll turn into a beautiful princess."

Billy picked up the frog, looked at it, smiled, and put it in his pocket.

The frog called out again, "If you kiss me, I'll turn into a beautiful princess and I'll stay with you for a whole week."

Billy pulled the frog from his pocket, looked at it, smiled, and put it back in his pocket.

The frog called out once again, "If you kiss me, I'll turn into a beautiful princess, I'll stay with you for a whole week, and you can do ANYTHING you want with me."

Billy pulled the frog from his pocket, looked at it, smiled, and put it back in his pocket.

The frog called out once more, "What more could you want? A beautiful princess who will stay with you for a whole week while you do ANYTHING you want?"

Billy pulled the frog from his pocket, looked at it, smiled, and said, "I'm a computer programmer, a girlfriend I don't need... but a talking frog is really cool!"