Personnaly, I couldn't have a hard-on for a pre-pubescent girl, because I have empathy and, let's talk concretely, I just couldn't bear the idea of hurting a little girl's vagina by putting my penis into it because it would just be oversized for her, the mere idea that she could be in pain and in distress would just immediately suppress any lust.
I also imagine what she would go through if a sexual intercourse was discovered : her intimacy would be deeply examined by various medical tools and then, she maybe would have to go to talk to tons of psychiatrists, maybe she would be hated by some members of her family and all these things would be traumas, she would feel so different from the others and what kind of life would she be able to build after ?
I think that before acting, if you are ever tempted by having sex with a little girl, just think about her before thinking about you. Maybe in a way, you have to move your body, your feelings and your mind into hers an just ask yourself concretely "If I was a little girl, how would I feel ?".
Though, I can be attracted to 16 year old girls just like by adult women, I can be turned on by a teen, included one of illegal age in many states of America. I'm not from the religious right-wing or prude or anything. And I'm also not denying at all that a little girl can have some sexual desire or sexual pleasure, and concretely be aroused, wet, feeling to be hugged, caressed, kissed and I think there should be much more openness and accurate information given to them about these subjects.It would be much more clever to inform girls about their feelings, including sexual ones, than to sell them lolita-style clothes or bombarding them with video clips on teen or preteen tv cannels, showing girls in chains bending their back doggy-style, and then telling them at the same time that sex doesnt exist for them and that they shouldn't even think about it.
But, as far as pre-pubescent girls are concerned, for the reasons I mentioned above, I don't think that these totally natural desires they are legitimately feeling, should be fulfilled by an adult man, because of the consequences. I'm not talking about what would happen to you, but about what would happen to HER.