Men are biased because of the discrepancy in risk between men and women. Men prefer younger women because male reproductive capacity is not at stake if somethin

Men are biased because of the discrepancy in risk between men and women. Men prefer younger women because male reproductive capacity is not at stake if something goes wrong. I think the empirical situation you're noting should be inferrable from theoretical consideration of evolutionary psychology and knowing that peoples' assumptions tend to be based on male prejudices.