Attraction to the attractive, to me, is a dangerous work of nature. Among human beings i mean. (Male peacocks are the pretty ones between the female and male, but i don't think the female peacock would be too concerned with his character or the way he manages his finances.)
When one becomes attracted to an attractive counterpart based on physical appearance alone, with respect to character judging, one tends to overlook the flaws, or think/fooled to think that flaws don't exist, or that all flaws can be tolerated, or that all flaws can never be too hard to deal with or made right. All because that beautiful, enchantingly gorgeous being is just... So desirable, that anything goes.
Right and Wrong. While some people do take great pains to change and/or to accept the other for all the bad points even after the inital rush (ie, they make the decision... to Love.) some other flaws may well be the very things that cause rifts and therefore a split between a couple in future. When i hear of fancying taking place before one actually interacts with the desirable target, my head screams: Blinded!
But humans are such that when we set our eyes upon someone of a different gender with agreeable physical features (well, at least for most of us who are not living alternative lifestyles), we begin to wish, to some extent, that we could associate with him/her. In the end, some do and some don't.
In cases where the "association" goes beyond just friendship into courtship, I salute those who have the sense to step out of a potential war zone when one sees that something cannot work out, as opposed to someone who is just too eager to be with someone, or wants an ego stroking or whatever else and so therefore enters into the relationship anyway.
There is a reason why you hear and will continue to hear that looks can be deceiving, good looks is not what's really important, beauty is fleeting, yada yada, because it's true. This is not to discount the fact that there ARE people who are stunningly attractive (by most standards) on both the inside and outside though. To those i say to you, good for you. :-)
So in obvious conclusion, all i can say is... Use (mostly) your brains. The heart, is a deceitful fella.