Hi fatjokes,<p>I am Radu, one of the authors.<p>As mentioned in our article (<a href="http:&#x2F;&#x2F;arxiv.org&#x2F;abs&#x2F;1510.07867v1" rel="nofollow">http:&#x2F;&#x2F;arxiv.org&#x2F;abs&#x2F;1510.07867v1</a>), the training dataset for attractiveness is from Blinq. The underage and above 37 years old face images were discarded. All people are heterosexual in our training dataset and mainly from Zurich area, Switzerland. 
Therefore, our model of attractiveness fits the cultural bias of Zurich, Switzerland.<p>We consider faces.ethz.ch a little fun tool. I hope that the fans of Yoona will understand :) With more training data from abroad Switzerland our algorithms will fit their expectations.<p>For age and gender we used much more and diverse data, therefore are more reliable for the majority of ethnic backgrounds.