The question of why many men express a preference for slim (or slender) women is complex, blending biological, evolutionary, cultural, and personal factors.
Preferences vary widely—some men prefer curvier figures, others athletic builds—but surveys and studies often show a trend toward slimmer body types in modern Western contexts.
Importantly, “slim” here typically means a healthy, low-to-normal BMI (around 18–22) with a low waist-to-hip ratio (WHR ~0.7), not extreme thinness.