Freud has another theory on what attracts us and he spoke of it in great detail in his 5 lectures on psychoanalysis. His theory being is we fall in love with our parents, for example I was in love with my mother when I was very young and forgot this. I believe this to be in fact very true, mainly because every girl I really like has tendancies that are similar to my mother's and some vague physical characteristics are similar as well (skin type, hair color, height). I began trying to think of a logical explaination that would fit for this and one I came up with stems from the nature vs nurture debate. I am a successful human being and I was born from my parents, so knowing my mother created something successful I would want to find a potential mate like her in order to bear a child. Yes this outlook is very primative but isn't reproduction one of the most primative urges in our mind? To reproduce is the only way to carry on the human race and this MUST be programmed in our mind for us to even exist today. Had this not been a key factor in our mind the ones that lacked this would have died off years ago, leaving only the ones with a strong urge to reproduce. Natural selection at its finest.
This is not my family.