Turns out there may be more to this evolution thing than 'first past the post'. Non-reproductive members of a species can help other members of the species to survive.
Essentially it's not about getting "my genes" into the next generation, it's really about getting the genes of "my species" into the next generation, and beyond.
Well, yeah, whatever floats your boat, gets you going, rings your bell, dings your dong, pops your champagne cork, whatever bangs your drum, tinkles your tonkles, whatever gets into your groove and whatever, quite frankly, bedazzles your vajazzle or spurts your spunk. That kind of satisfaction. Just so we're clear. Hope that answers your question.
We are animals, monogamy is not a part of humanity like it is in penguins.
Our penises reshaped over millenia of orgies just to get all the other guys cum out.
We are sluts of the animal world, like rabbits
It implies that there were enough guys getting sloppy seconds for dick shape to give a reproductive advantage.
While it could have been from a lot of free love in the ancient past, I suspect it's more likely much darker than that and the evolution of cuckolds is intertwined.
Female human here. I've honestly always just read it literally, a person having sex second in a multiple partner scenario, and it being sloppy down there for all involved. There's just as much guy in the statement as there is girl, doesn't seem all that problematic to me.