Good question, Sophia...this is a hard question to answer very well, because realistically only you can know what you need to put in your paper and what your argument is. What you want to ask yourself is "WHY is slang not necessary?"....and then jot down your answers as a kind of list, and then expand on them afterward (brainstorming). Also, when you write your paper, make sure you do NOT write anything about something being "your opinion" or "I think" or "to me"....in other words, don't include any statements in your paper that state that your argument is only your opinion, because it is redundant (an argument paper is ALWAYS someone's opinion) and it weakens your argument when the reader is reminded that the argument your making is really just your opinion. It's like saying "my argument isn't really based on anything other than how I feel"....not good. So yeah, brainstorm your arguments as to WHY slang is unnecessary by using short bullet point ideas, and then when you're done with your list, elaborate on each one, and then combine them together using standard compositional techniques. As for humor, the gratuitous inclusion of a choice "slang" word or too that is funny or silly should be an easy way to get a laugh. Good luck!