Mostly it's a play on Disney's The Lion King, which has a scene where the king lion explains to his son the "circle of life" that while lion eat antelope, eventually lions die, "their bodies become the grass" and the antelope eat the grass. Perhaps there's some political commentary about a victimizer using school lessons as propaganda to make the prey class easier to subjugate for the predator class, ie force teachers to teach the correct curriculum and the antelope will thank the lion for eating it.

Also, it's Oglaf, so the main punchline is that the last panel somehow isn't "Oh well, anal sex!"