Dazelled - There are endless examples, but sure I can give one to make the point.
So I know this woman who'd never want to be cheated on, but you may be aware of the accusations against Cain, the presidential candidate. While she'd never want to be cheated on herself, her reaction to those accusations (her immediate reaction, not the well thought out ones) was quite different than what her intellectual view would explain. She felt an immediate need to defend him, and assume the woman just made it up when the first report came out. Even as a few more reports came out, she felt some need to defend him. Why?
Well it is explainable from evolutionary psychology point of view. Cain represents an Alpha male type, a male who apparently has/makes many opportunities to reproduce his genes. Plus he is married, which suggests he could also be a male who is at least capable of providing resources and safety for one woman. So on some level that kind of male is evolutionarily attractive. Her instinctive reaction may be no more complex than that because in evolutionary psych theory there are some ideas debated that we people tend to be pulled in two directions when it comes to our primal instinct to reproduce our genes. On the one hand we are drawn to a stable mate who could we raise our offspring with. On the other hand, we are drawn to types who are less stable, but have other evolutionary advantages. An Alpha male for example is more likely to have an offspring with similar characteristics, which means good odds that the child will have sex with many others, and reproduce as well.
That's the theory anyway, unfortunately greatly simplified. Unfortunately limited proof (some studies and proof, but not enough that it's reasonable to remain doubtful of course). Still an interesting theory that predicts that people will have conflicts between what their social training/intellect says, and what they actually respond to.
And no, I've never sat down and made a list of qualities I want in another. I see no reason to do so. I'm changing, and I also don't necessarily know what I really want vs what I think I want