However, R. Chris Fraley and Michael J. Marks have published experiments in the Personality and Social Psychology Bulletin that suggest that an aversion to incest might just be a social construct, and that humans do, subliminally, find their relatives sexually attractive. Fraley and Marks conducted three experiments to evaluate familial attraction. In the first, they asked volunteers to rate the attractiveness of strangers. Before showing the participants the images, however, researchers flashed a picture of their opposite-sex parent on the screen.