"This is meant to be funny because wanting to fuck FF is technically both Zoophilia and Necrophilia, so OP says that both of these are ok in an ironic way because those practices are both wrong and disgusting. Ok guys thank you for reading, see you later"
"Hey guys, Peter Griffin here. You see, the joke here is that the OP is saying zoophilia and necrophilia is not that bad, while reposting a picture of the character FF from JoJo bizarre adventure, who is a dead Girl body possesed by plankton which means that OP wants to bang her"