To create a satire topic, you could also start with a random (even serious) topic and look for ways to alter it in order to make it humorous - make exaggerations, play with the context, mix the unmixable, etc.
It could help to think about old good human nature, current weird trends in society, funny self-deprecation, etc.
After all, in order to produce your best work, it is important to choose a topic that you are passionate about and that you know enough about to form an opinion and create a humorous analysation.
Plus, it is going to be a lot more fun to choose a topic that you love and easier to share your personal thoughts!
But, this is what makes a satirical essay one of the best ways to write; you get to share your own perspective and include your own personal spin on your work.
This means that also this style of writing is fun and humorous, it can also be educating and thought-provoking.
You are providing facts for your reader, as well as a sarcastic and entertaining stance on the subject.
Of course, this usually means that you have to have an opinion on the subject matter.
Often, this means poking fun at a subject, and although the facts are normally correct, they are portrayed in a way that is exaggerated so that they are funny for the audience or reader.
A satire essay is often interesting and fun for you to write, as well as hilarious and fun for your reader too.