Qualities such as for instance muscularity are «cues out of family genes one to increase children stability otherwise reproductive victory,» state authors David A good
Inside the a 2007 study on School out-of Ca, La, 286 lady tested photo out-of shirtless boys and you can expressed which of these appeared like they might improve finest much time- and you may small-name lovers.
But Frederick and you can Haselton grabbed out some other informing looking for: Less-muscular people was basically recognized as a better complement long-term relationships.