"Suppose I say to you in English that “I spent yesterday evening with a neighbor.” You may well wonder whether my companion was male or female, but I have the right to tell you politely that it’s none of your business. But if we were speaking French or German, I wouldn’t have the privilege to equivocate in this way, because I would be obliged by the grammar of language to choose between voisin or voisine; Nachbar or Nachbarin. These languages compel me to inform you about the sex of my companion whether or not I feel it is remotely your concern. This does not mean, of course, that English speakers are unable to understand the differences between evenings spent with male or female neighbors, but it does mean that they do not have to consider the sexes of neighbors, friends, teachers and a host of other persons each time they come up in a conversation, whereas speakers of some languages are obliged to do so."

Does Your Language Shape How You Think?
Guy Deutscher, New York Times