I’ve watched the clip twice and I generally agree with him, but I’m not sure how I feel about his discussion on cheating. I think people are capable of monogamous fidelity. He’s suggesting slips happen, and I think he overstates his case where he suggests (at least implicitly) that slips are inevitable not just in the overall run of couples, but for each couple as well. I think the closest where he comes to saying so explicitly is the part where he says that a man who cheated only 3 or 4 times over the course of a lifetime monogamous relationship was good at monogamy. That claim, strictly speaking, would not imply that men can’t go without cheating, but rather that men who do so are several standard deviations away from the mean, which perhaps he meant but it’s not very clear. Even then I think it would likely be overstating things.
I think his central point about cheating (or perhaps I’m just rationalizing his discussion) is one he left too implicit – that cheating in itself is not a problem where it represents a simple lapse in judgment. Not cheating demonstrates honesty and loyalty, but there are other ways spouses might be dishonest without it breaking the relationship or generating so much heartache, and I think Savage is trying to point out that if it’s not symptomatic of larger relationship problems, i.e., if it’s only a momentary weakness, and if it has no adverse health consequences (something I would prefer people to mention explicitly in these discussions) then the cheating shouldn’t be relationship-ending since many other violations of trust wouldn’t be either.
I think my interpretation is correct, but if so then he assumed his audience was more sophisticated on these matters than a general audience likely would be since he left so much unsaid.
edit: of course on the other hand, if he said it my way nobody would pay him to appear, haha