Now the Genie being a practical Genie made sure that all the men were made obese. Not a one was under 350 pounds as an adult.
The boys when born were fairly rotund and would continue to round out as they grew up.
But the girls remained thin. Devastatingly thin. Dramatically different from the men. This made it easy to tell the men from the women. Just like the Genie planned it.
But the Genie also knew that if the men were all gay and the women were all lesbians how would this race continue. He could make them immortal but that wasn't part of the wish and he wasn't willing to create a rift in the world of immortals to make this a reality. He could make the men able to have children but he didn't want to do that either. Instead he made sure that the men would donate their seed at local sperm banks and the women would come to be impregnated.
When the women were pregnant It was easy to tell if they were having a boy or girl. The baby girls would only cause a slight bump. But boys would make the women look like they were carrying a beach ball in front of them. And if they happened to have gotten the sperm from a really obese man they looked positively round.
Now it didn't take long for them lose the baby weight but it was the only time that women approached the roundness of men.
Once born the boys were placed in a well deserving home with two nice fathers.
And the girls were also placed in a nice lesbian home. Not a one of the children were placed in the birth mothers home, nor the birth fathers home.