Or is it just society that drums that into them?
I was wondering when recently my 2 year old nephew was drinking out of a pink cup. He didn't seem to care at all what colour the cup was but my sister/his mother came up and was all like "no no he can't drink out of a pink cup" and changed his cup.
Before that happened he would have seen pink in a neutral light? But after that he now sees pink as a colour not to associate with?