MC: God, I have a question.
God: Fire away.
MC: I did nothing special in life. I'm just an ordinary salaryman who happen to be run over by a truck. I don't think I deserve getting godly powers just because of this.
God: But the readers like it better this way.
MC:...
God: it's easy to get published even if you can't write worth shit--and I can finally get someone to draw my elf waifu with big tits.
MC: God...?
God: Not to mention, I can have Hanazawa Kana do her voice when it got an anime adaptation.
MC: I don't understand.
God: There's nothing to understand. You just go there and make us all amused with your new life. That's the price for your Cheat, give and take.
MC: By the way...God?
God: What again?
MC: Am I going to be reincarnated as a generic male again?
God: You don't like it?
MC: Uh...the truth is...I want to be a little girl for the longest time.
God: Alright, no sweat. We can make it a Yuri harem story as well. People love Yuri and Lolis.
MC: Plus...I'd like to have a big penis as well...
God: Damn you, do you want me to write a hentai novel?
MC: Yup...I wanna do kinky stuff as a little girl...with cute girls of my fetish.
God: Errr...you're one weird guy, you know that?
MC: I feel this life has no meaning if I'm not a futa loli with a big penis, OP Cheat Skills and a harem of cute girls.
God: It's really strange how it rhymes so well. Alright—before I got horny and turn into a girl as well, off you go.
...and that's how the MC becomes a gay loli which charmed the other world with her cuteness, OP skills, and especially her penis.