Pyramidal Triangle Face

Some people find a face beautiful that has a three-dimensional pattern of a quadrilateral pyramid (3D). That is to say:
The base of this spatial form (3D) consists of the two eye sockets and the shape of the mouth, which together form an equilateral triangle, ideally. Above this, the nose bulb floats as the highest point of the pyramid.
You might imagine that the round eyeballs form two of the four vertices; and the pursed mouth (or the chin) is the third vertex in the same plane as the eyes. The fourth vertex is the nasal bulb. In standing position: the nose protrudes horizontally from the face and gives the third spatial dimension to the quadrilateral pyramid. (When the person is lying down, the tip of the nose points vertically upwards as the top of a pyramid.)

Image: Pyramidal appearance of a triangular facial shape.
(Image by JKByrd from Pixabay [AI-g]. )

The equilateral lengths of the triangle depend on the age of the person. Babies have more of an equilateral triangle as a base. Some adults (and some ethnic groups) have a more elongated face, with the mouth further away from the eyes than the eyes themselves.

Perhaps the pyramid shape has reached a perfect equilateral structure at the age when people marry and have children; the phase of young adulthood (adolescence) is what biologists call: the mating-ready age.
Be aware that the psychological and legal age of adolescence does not correspond to the biological age in every ethnic group. Some people are at their most beautiful at the end of puberty, even though certain laws or morals prohibit them from marrying, having sex, or having children at that time. By the time these adolescents are officially adults under the law, some have already passed the peak of their beauty.
Because laws delay the birth of adolescents, combined with biological attraction, optimal beauty will shift to a later age (statistically speaking), after at least thirty human generations ahead into the future.