Why did the white cat sit on the computer? Because it wanted to keep an eye on the mouse!

And that’s why this pun is fun:
This pun is funny because it plays on the double meaning of “mouse”: one is the computer accessory, the other a literal mouse, which cats typically chase. Matthew Stewart, being a technology enthusiast with an interest in innovations, would appreciate the tech-related humor combined with a classic animal joke. The tone is light, clever, and tech-savvy, matching Matthew’s background.