They are often creative and unique. Since they don't have the constraints of modern copyright, they can be inspired by a wide range of sources. For example, some might be based on old folktales that have entered the public domain.
If you are into creative writing or content creation, you can use these short stories as inspiration. You might rewrite them from a different perspective, combine elements from different stories to create a new piece, or use the plot as a basis for a new story, as long as you respect the fact that they are copyright free and don't try to claim false ownership.
One characteristic is that they can be freely shared and distributed. Since there are no copyright restrictions, you can pass them along to friends or post them on your own blog without asking for permission.
Copyrighting short stories is done by documenting your creation and submitting the necessary paperwork. It's important to keep records of when you created the story and any drafts. The process helps protect your intellectual property.
There are multiple ways. You could use them to start your own writing group. Share the short stories and then discuss the themes, characters, and writing techniques. You can also adapt them into a different form, like making a short play out of a short story for a local community theater, as long as you keep to the rules of the non - copyright license.
There are also some creative commons platforms. For example, Wikimedia Commons might have some texts that are free to use and could include funny short stories. You need to check the specific licensing terms though. Usually, those marked as 'public domain' or with a license allowing reuse are good candidates.
You can try websites like Project Gutenberg. It has a vast collection of public domain stories which are copyright free. Some of them might be comedy short stories.