Randomness is an interesting thing. Randomness can be anything, but it doesn't have to do with anything what you are talking about. For example, if you said that peanut butter tastes good and then said that a building is red, that would be randomness.Sometimes being random is fun. When you talk to friends it can be fun for you, but then it will annoy them, which will be even more fun for you! Having fun is fun. When you have fun, you feel joy inside your heart and you feel like you will explode with joy. Exploding things can be fun. But other times not. If you explode your spelling book and then tell your teacher that it caught on fire, then that would be fun. But it isn't fun when you heart explodes.
It is fun to call people random names. There is no limit to random names that you can call people. You can combine any words and it will be a random name or a phrase. Like cellery cheese. If I were to call someone celery cheese, they would be like "Huh?" They wouldn't be able to tell if it is a compliment or not so they couldn't get mad at you. Although they probably would think it was not a compliment. Remember, there is no limit to what phrases or names you make.