The evolutionary psychology theory that women have a “dual” sexuality is the premise behind TRP’s concept of hypergamy and AF/bb The dual-sexuality theory has a major replication problem.

10 years ago, a study showed that straight women prefer more feminine features on men when they are less fertile and more masculine facial features when they are ovulating. This study inspired a new branch of research in eco-psych, and it’s the basis for AF/BB, hypergamy, and AWALT.

It turns out that the original masculine faces study doesn’t replicate. The original study was probably just an outlier, but the studies that built on the original conclusion before it was replicated fell prey to bad methodology, errors in statistical analysis, cherry picking, and all of the other usual suspect in the replication crisis.

New research has been quietly undermining the dual-sexuality theory for years, but things came to a head when one of the original researchers on the face study conducted his own follow up using a larger sample size and more rigorous methodology. The results did not support the conclusions of the original research, and in a recent article nyerview he declared that the dual sexuality probably isn’t true.