Zoe Is A Guy's Name

"Okay, what's your name?" she asked her boyfriend. "Zoe." "Well, that can't be right. I thought I said ..." Just then, her older sister and the female Jon walked out to the parking lot and met them. "Karl, what are you doing here?" asked the female Jon. "Karl? My name is Karyn." "But, Karyn is a guy's name." Then Karyn (now Karl, apparently) finally got it. Her wish made it so that the name Zoe was a guy's name. Now all female names had become male names and vice versa.