Possibly a bit tangential to the discussion, but there&#x27;s some chance the &quot;pink vs. blue&quot; convention has a biological basis in respect to male&#x2F;female color vision differences.<p>For example, red-green color blindness affects about 7% of males, and &lt; 0.5% females.  IOW on the whole males are more likely to be able to see and respond to blue than red or pink.<p>There&#x27;s also intriguing if incomplete evidence that among humans with normal color vision, females are more likely to have finer color discrimination ability in the yellow-orange-red end of the spectrum compared to their male counterparts.<p>Of course, there are going to be a few males &quot;outliers&quot; who have superior color discrimination ability, so a boy could very well appreciate pink even if it&#x27;s not as likely as it would be among girls.