&gt;&gt; there&#x27;s some chance the &quot;pink vs. blue&quot; convention has a biological basis<p>That makes no sense to me. I&#x27;m Greek and in my neck of the woods boys and girls are not expected to wear specific colours, at least not when I was growing up.<p>If you do a search for Greek traditional dress you&#x27;ll notice that the colours that dominate are white, black, red and some shade of brown, but they are both pretty much equally distributed between men and women.<p>That&#x27;s empirical and maybe someone somewhere has a proper data&#x27;d study that contradicts me but you really won&#x27;t find anyone who can point to examples of pink dominating women&#x27;s traditional dress in Greece.<p>I believe the same goes for other cultures. Every time I see the traditional ornamentation of people from the Amazon, or sub-Saharan Africa for instance, vivid bright colours seem to dominate for both sexes. If I think of South-East Asian traditional dress, I get an impression of oranges, yellows, and reds for the women (who do tend to wear the most colourful stuff).<p>And there&#x27;s nowhere a shade of pink to be found.<p>So I think this blue vs pink thing is definitely a cultural phenomenon and that it&#x27;s really just affecting specific parts of the world.