Regarding Erik's wife...
I admit to being a nerd my whole life and too caught up with whatever I had on the go [school, army, website] to date or sleep with many girls in around 2006 when some started warming up to me I still only had an interest in the ones who themselves had interesting things to say. For one, Erik's wife has a pretty face and she can lose the weight. If a person has a bad face, that can't changed, other than surgery and even that can only do so much. Erik is a smart and educated guy and probably found someone he can talk to and the weight didn't matter much. Although I will say if he were to help her trim down it would certainly reflect well on his ability as a trainer.
I know of a girl who is good looking but a total snob/psycho. I don't think I could tolerate her for the few minutes necessary to have sex with her, let alone anything more long term than that. Looks will get you in the door and they are necessary to some extent initially but they do eventually fade. I simply need to spend time with people in general who I can hold a conversation with.