Help Mom and Dad

"Yeah," said Jon, "but still. I didn't mean to affect them. I should be able to fix this... I wish that occasionally some boys have girl parts but that Mom and Dad aren't affected by anything like that. I also wish that there are no spontaneous sex changes, except using wishes, of course." "Jon," said Karyn, "maybe you should think before wishing." "What did I do?" "You said 'occasionally'. That means there could be someone else affected. Maybe your brother." "I guess I did, but do you know how unlikely that is? Look, I wish I knew how that wish affected my brother." Jon paused and said "Mikey is just like he was before I made any wishes. He's a boy with boy parts." "That's good," said Karyn. Though it turned out that....