Housebroken Lunatic said:
Unscientific blanket statement.
The fact of the matter is that there are no scientific evidence to suggest that humans are (biologically speaking that is) either polygamous or monogamous lifeforms.
There is plenty of evidence to suggest it. We don't have detailed observation of ancient humans, but we have the biology of said ancient humans, no amount of society is going to change that.
A) Our sperm include a type of sperm that actively fights and kills other men's sperm
B) Our penis is shaped to displace the sperm of others in the incident of "sloppy seconds" to better ensure that the 2nd donor's sperm have a better chance of fertilization.
C) Studies have shown that men unconsciously penetrate deeper when they think their partner has been with another man.
And that's only a handful of biological evidence that I'm aware of that, suggests otherwise to your claim that there is "no evidence"
And in terms of your love lust comment, the reason I wont argue it, is because it's not the point of this topic.
Edit:
Oh, and "Mate for life" in the rest of the animal kingdom is incredibly rare, and the other creatures that have sex for fun, are not mate for life creatures. Nor are any of our closest animal relatives.
Edit x2:
I suppose I should have got caught up to date on the thread, others have started to point out how you're wrong.
Edit x3:
Alright, I'll go ahead and say one thing about the love and lust, then drop it.
Love and lust, two different feelings made from two different chemical reactions.