What do you mean when you say "gender"?

Despite the many discussions, conferences, symposia, organizations, demonstrations and social engagements surrounding the topic, many are not precisely concerned with gender issues. What is the sector really interested in? Why do the discussions about gender only involve men and women? Are these social debates? Have we been so caught up in the fictional reality that our bright human intellect created, that we can no longer identify when we slipped off track?