Here we have an anthropomorphized pig, or a woman represented as a humanoid pig, getting kidnapped and eaten. If this woman or whatever is able to be part of human society as pictured, eating her fits the moral meaning of cannibalism.

The comic is just using the pig visual to “joke” about rape, but if you think about it a few seconds the joke is not much better, especially with the underlying tones of showing women as victims, the only difference between a human woman and a pig woman being that one is good for rape, the other as food.

I personally can’t even understand how this can be funny.