In the field of gluteal enhancement, Mexico City holds notable significance. It was here, in 1979, that plastic surgeon Mario González-Ulloa pioneered the use of silicone implants designed specifically for buttocks. Referred to as the “grandfather of buttock augmentation” in the textbook *Body Sculpting with Silicone Implants*, González-Ulloa established a benchmark. The early 2000s brought forth a new generation of specialists in Mexico City, including Ramón Cuenca-Guerra. His 2004 publication, “What Makes Buttocks Beautiful?” delineated four characteristics of desirable buttocks and five “defects,” providing remedies for each. Personally, I resonate with defect type 5, the “senile buttock,” as defined by González-Ulloa with charcoal nudes juxtaposing the uplifted “happy buttock” against a sagging “sad buttock.”

While I value the initiative to standardize procedures, I found myself questioning Cuenca-Guerra’s criteria. What was the basis for their establishment? A committee of six plastic surgeons analyzed 1,320 photographs of women aged 20 to 35 from the rear, pinpointing traits of attractive buttocks.

Intrigued by the notion of the visually desirable female physique, I attempted to contact Cuenca-Guerra using a reference from a recent publication, but did not receive a reply. He had passed away. I engaged with his associate, José Luis Daza-Flores, a third-generation expert who trained under Cuenca-Guerra.

Daza-Flores and Cuenca-Guerra co-penned “Calf Implants,” which investigated the aesthetics of calves and pinpointed areas for enhancement, with plastic surgeons evaluating 2,600 images.

Remarkably, they associated appealing lower leg measurements with the mathematical divine proportion (or golden ratio) of 1.6 to 1. This ratio, which divides a line into two parts, was applied to legs in a manner reminiscent of how ancient Greeks utilized it for the “ideal” visage.

The paper contained assertions such as: “Seventeen women exhibited slender legs, resembling a tube, with a 1:1.618 ratio in A-P and L-L perspectives.” While I didn’t grasp it completely, it appeared to mathematically depict cankles.