Sure, here's a lighthearted take on the three laws of robotics:

Why did the robot go on a diet?

Because it wanted to follow the first law of robotics: "A robot may not injure a human being or, through inaction, allow a human being to come to harm." It didn't want to accidentally squash someone while reaching for that extra slice of pizza!

Remember folks, even robots need to watch their circuits and keep those calorie counts in check!