A little sick and wrong, but who knows, maybe Freud was right

You Are Sexually Attracted to Your Parents, Yourself

In a series of experiments where subjects viewed photographs of their opposite-sex parent or a photo morphed with their own face, researchers found that people are turned on by photographs of people who resemble their close genetic counterparts.

“People appear to be drawn to others who resemble their kin or themselves,” said psychologist R. Chris Fraley of the University of Illinois, lead author of the study published July 20 in Personality and Social Psychology Bulletin. “It is possible, therefore, as Freud suggested, that incest taboos exist to counter this primitive tendency.