Not everyone who is not having kids is doing it to free up time. Lots of children need homes and some of these communities have dreams to still have kids, which is given foster and adoptable children, places to go. Choices based on culture is not always obvious. Most people who are gay aren't thinking, oh the worlds over populated lets put our focus in something else, most people are discouraged from children due to experiences in life. For me, over population bothers me because I had a bad experience in life period, especially as a women growing up with women stereotypes as a homosexual culture emerges. A kind of disgust exists for the people that suffer and animals that suffer at the expense of too many humans but not enough people trying to better these humans or animals.