Love is not genetic, attraction is.
Female does not only look for guys who are good at reproduction, they also look at the health of the male (how good-looking, howbig, how strong, any disease) to gauge how the kids will carry those traits. They also gauge how the male will take care of her and the young. Same thing as how we look at their boobs to see how healthy the female are, look at their asses to guage whether they are suitable for reproduction, and look at their moms to gauge how the girls will turn out (fat, ugly, slip, nice body, etc).
Welcome to biology and evolution. Animals out there do it (ok... minus the looking at their moms part.)
Ezekiel 25:17. The path of the righteous man is beset on all sides by the inequities of the selfish and the tyranny of evil men. Blessed is he who, in the name of charity and good will, shepherds the weak through the valley of the darkness. For he is truly his brother's keeper and the finder of lost children. And I will strike down upon thee with great vengeance and furious anger those who attempt to poison and destroy my brothers. And you will know I am the Lord when I lay my vengeance upon you.