[Sciolist]

1) Sleep at all. Wouldn't it be an advantage to not have to?

1) Losing muscle if you don't use it. Though I suppose this is just something that's inconvenient now, as we don't need it to survive.

3) This may get me in trouble. Porn. Why is it we like it? It's just because that part of us can't differentiate between a real person and a picture of person. It doesn't realise it isn't the same as the real thing. Surely this is bad?

Also:

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3) Like/Dislike for Certain Foods: It seems like we'd be much healthier if we just craved whatever foods had whatever nutrients we need most, and I guess to some extent this is true. However, it's clearly not completely true. Some people have really weird tastes in food that seem to be biological and seem incredibly unhealthy. I guess the classic example is the kid who won't eat his broccoli, but there are a ton more

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I think this might have sound reasons. For example, if someone only likes meat, they'll get a lot better at finding it than anyone else, which will probably benefit their genes (i.e, they'll [censored] more). Or, what if there's a weird disease that's spread by broccoli? People who don't eat it will survive, so there's more likelyhood their genes will spread. Obviously there'd be a critical number that's important here (i.e, chances of this happening vs. problems of not eating your greens), but I imagine that a small percentage is sustainable in that way, particularly these days.