"The book argues that humans are not “naturally” monogamous. That might be true. But Sex at Dawn doesn’t prove it."
"males evolved a strong appetite for sexual novelty and a robust aversion to the overly familiar.” But they don’t have any evidence for that"
If they don't, I think it is safe to assume it is because the authors assume their readers have a bit of life experience. And not because there aren't volumes of biological and historical evidence to support these claims if they wanted to include it.
I just don't see these two points as even being controversial enough to be up for debate. You don't need that much romantic history to know that men have a strong appetite for sexual novelty, and that highly desirable men are not monogamous, that women know this ahead of time and are willingly complicit in their non-monogamy.
Ok, I guess for the type of guy who would write these critiques, some things need to be spelled out on paper. You can just step outside in the world though and not need it to be.