This is going to sound like cold water… but it’s important you all (!) remember that the presentations are a means, not an end.
I train people in making better business presentations and my wife’s a teacher: I can assure you that the reason you’re making these presentations is not because the presentations are important (per se) as you think they are. If teachers/lecturers/professors give you a research topic which finishes with a presentation remember that the presentation isn’t the important bit… it’s just there to finish of the topic with a bang and to get you to formulate your thinking clearly. The important bit is doing the research and learning your topic!
Scatology has a long literary association with satire,    as it is a classical mode of the grotesque , the grotesque body and the satiric grotesque.   Shit plays a fundamental role in satire because it symbolizes death , the turd being "the ultimate dead object".   The satirical comparison of individuals or institutions with human excrement , exposes their "inherent inertness, corruption and dead-likeness".    The ritual clowns of clown societies , like among the Pueblo Indians , have ceremonies with filth-eating .   In other cultures, sin-eating is an apotropaic rite in which the sin-eater (also called filth-eater),   by ingesting the food provided, takes "upon himself the sins of the departed".  Satire about death overlaps with black humor and gallows humor .