"...to be a woman?"
Aaron was rather taken by surprise, and blushed hard at that. "What are you talking about?" he said defensively. "I don't want-"
"Aaron," the voice interrupted, "I do not wish to judge you. Quite the contrary. I understand how much those feelings you have about your gender hurt humans, and I want to do what I can with my powers to help with them. No one else shall ever know of anything you tell me. So, if I may repeat the question: how long have you wanted to be a woman?"
The boy was still in shock from all this, but the voice's kindly words were wearing down his resistance. "I-I think it started when I was, like... 12 or 13? Whenever you start puberty and become aware of sex and stuff? Obviously I knew I was, like, developing or whatever you call it, but I had thoughts I knew I couldn't tell anyone." His voice quaked a lot, because he hadn't spoken this to anyone before. "I noticed the way guys feel towards girls, and how I felt towards girls, and... I wished someone would feel that about me. Like, you know, that someone would love me as a girl. And I wished I could dress how the girls dressed, that I could wear a skirt or dress like how girls can wear jeans or trousers and no one really cares."
"Oh, Aaron," the voice said sympathetically. "That sounds awful. You did not deserve to have to feel like that and never be able to act upon it."
Blushing again, he replied, "thanks."
"May I ask something else?" it asked him. He nodded, and it replied, "Did you ever fantasize about being a woman?"
As if to make manifest how complicated Aaron felt now, he had started to get hard from the questioning. "Yeah," he answered, "a lot. It started out with me, I guess, imagining I could be friends with girls I was too shy to talk to, and then going out with them. When I-" for a moment he wasn't sure whether to admit something, but he decided it was for the best to- "when I realized what I was feeling, and I realized it made me feel good, I started getting off to it a lot. I imagined guys I liked wanting to be with me because I was a cute girl, and how nice it'd feel to be fucked. I imagined playing around with girls I liked, making them feel good while they helped me pleasure my different body. I would get off thinking about having girl's parts, sometimes I'd... I'd imagine my masculine body getting feminized, my flat chest growing into soft tits and my cock sucking into me so I'd have a cute pussy. That way, I could get fucked and made pregnant and have someone's babies. I know that's not something men are supposed to want, but I do!" His tone sounded almost anguished as well as excited now. "I want it so bad."
When he finished, the voice spoke. "It is so brave of you to say those things at last, Aaron. Thank you for your honesty," it said. "I want to pay you back by changing your body for you, giving you one you will be happy with. But I need to know one thing."
"Yeah?"
"Tell me, do you see yourself as only a woman?"