Question: Seeing as how Finn is a human, and he was born during post-apocalyptic times, who are his biological parents?
OK, the only humans, "humans" being used in the broadest sense of the word, around that time period were Simon, Marceline and, as a possible extra, Susan Strong.
Now, unless new evidence of there being other humans around at the time of Finn's birth, which of these three would've seemed more likely to procreate?
Sorry, just thought of it... highly doubt it means anything anyway.