A study in Liverpool was just released that found that mothers who smoke while pregnant increase their likelihood of bearing girls. Even mothers who are only exposed to secondhand smoke decrease their chances of bearing a boy. Which raises interesting ethical issues here. Obviously, it’s bad for people to smoke cigarettes, especially conceiving mothers. But it’s good for the world, in my personal opinion, for there to be an over abundance of women. So perhaps we should be nudging those pregnant women to have a couple of packs, eh? I wonder if the mother’s drinking alcohol during pregnancy increases the chances of bearing men . . . .