This special meaning for "red" did not trouble Mike; he knew before he reached Earth that every English word held more than one meaning.  It was a fact one could get used to, without grokking, just as the sameness of all girl faces could be gotten used to... and, after waiting, they were no longer quite the same.  Mike now could call up Anne's face in his mind and count the pores in her nose as readily as with Jill's.  In essence, even an egg was uniquely itself, different from all other eggs any where and when - Mike had always known that.  So each girl had her own face, no matter how small those differences might be.