In the movie "The 40-Year Old Virgin" they say not to put the pussy on a pedestal. If I may borrow that line, I say to you, "don't put sex on a pedestal"

You seem to be thinking way too much about the sexual pleasure and assuming way too much. If you lick a child's genitals they are not going to develop a complex. They will like how it feels and as long as it was consensual that's all that will happen. Well, your bond might also strengthen and it can help relieve stress as well as just make her feel good overall.

Do you question, that if you give a little girl a massage, that she will demand people always please her? Of course not. When a little girl gets her vagina licked by a boy (or girl) her age, will she demand they always please her? Most likely no.

Your main issue is the social status of adult/child sexual interactions and the desexualization of children and the fierce illegality of it. Not any worries about a little girl developing a "men please me" complex.

She can lust and she can have affection. The two are not always seperated. They can be, but they can also be united.

This is coming from me as a non-paedosexual by the way.

No, marriage is not necessarily feasibly, or at least marriage as you are thinking of it, not marriage in the traditional sense. Nor should you put such a burden on a child, to be there to take care of you. It's not fair, however your problems stem from society.