"I wish I knew how Mom came to be a man," said Jon, hoping his mother wouldn't hear him. The stone did hear him, and he felt an injection of knowledge into his brain.
In this new reality, people naturally transitioned between genders every six months. The dividing line between fashions of different gender was blurry. No wonder his very masculine mother was wearing a miniskirt and still had a hairstyle that was feminine by the old reality's standards. The switching back and forth only stopped when a person became pregnant during its female phase. After childbirth, the cycle would begin again, and the mother would gradually become a man over the next half-year. His mother was at the peak of her male phase. In six months, she'd be a woman again.
Uh-oh, thought Jon. I must be in my male phase. I still feel like a guy, but I won't for long. I wonder what phase Karyn is in. Or even if she is a Karyn. Do we all have unisex names now, or different names for different phases, or ...
The doorbell rang. Jon opened the door. It was ...