Why do French men have curly mustache?

Answer 1

Texture of hair is a genetic trait. If one has a curly moustache, it is a result of a curly moustache gene or gene combination. If many individuals of a specific region or ethnicity have a similar feature, it is a logical assumption that that common feature has become a dominant gene among that ethnicity.

Answer 2

Curly mustaches became popular in France in the 19th century as a symbol of masculinity and elegance. The trend was influenced by French military officers and aristocrats who adorned themselves with elaborate facial hair styles to showcase their status and sophistication. Over time, the curly mustache evolved into a cultural symbol associated with French style and charm.