This website contains age-restricted materials including nudity and explicit depictions of sexual activity.
By entering, you affirm that you are at least 18 years of age or the age of majority in the jurisdiction you are accessing the website from and you consent to viewing sexually explicit content.
It’s not necessarily sexual dimorphism. It could be gender dimorphism, as supported by the findings that colour differentiation depends on linguistics.
What you’re saying is true, it’s in the book Neurolinguistics and Linguistic Aphasiology regarding color and linguistics