Why did the beaver break up with the squirrel? Because it found a tit-bit too much to handle!

And that’s why this pun is fun: This pun plays on the phrase “tit-bit,” meaning a small piece or morsel, and the amusing idea of a beaver dealing with a squirrel. The humor comes from the wordplay and the unexpected animal couple scenario. It’s fun because it blends nature with a common phrase humorously.