* The art of procrastination. Procrastination is a common problem, but it can also be a source of humor. This speech could explore the different ways people procrastinate, the excuses they make, and the funny situations that can result from procrastination.
* The science of why we laugh. Laughter is a powerful tool that can bring people together, relieve stress, and even improve our health. This speech could explore the science behind laughter, what makes things funny, and the different ways people laugh.
* The psychology of social media. Social media has become an integral part of our lives, but it can also be a source of humor. This speech could explore the different ways people use social media, the funny interactions that can occur, and the humorous trends that have emerged from social media.
* The world's worst jokes. Everyone loves a good joke, but some jokes are just plain bad. This speech could explore the different types of bad jokes, what makes them so bad, and the funny stories that have come out of them.