Beats me, epidemic, the one difference I can see is that we recognise love when we encounter it. But is that enough to "Aha! Therefor Freya!"
Seems a bit ... mundane, really. If one clings to so flimsy a proof, why not just go "Rainbow! Therefor Heimdall!"
Sacrifice is indeed not limited to humans, so that can't be it.
Monogamy? does that even exist in humans? If you look at the amount of philandering going on, or polyamory that's on the rise, or societies where monogamy is not even a social construct ... never mind all the sex people engage in BEFORE a guy in a dress speaks a magical incantation over them ... where's the monogamy?
I suppose that giving people awesome genitals and then telling them to not use them could indicate a trickster god. So ... Fornication! therefor
I watched a program recently (forgot the name) where they tried some of the mating rituals of chimps to wonderful effect in the bar scene. of course they were modified to avoid the poo flinging and grunting but the essence of the chimp rituals seemed to translate.
If you could remember the name of that program ... that would be awesome.
Though ... they took out the poo flinging?! Why?! It's not a party unless someone flings poo!