You're not going back far enough.

You are lending weight to your childhood experiences, but that only delays it.

Did childhood experiences with girls happen at random, or did they happen because you were already seeking out little girls? Especially, why not boys? There's an age barrier with women, all right. But why not boys?

I had no experience at all with females until I was in my teens. Yet I had had experiences with boys sporadically all my childhood. Yet I am not a BLer (or a teleophilic gay).

An experiential aetiology demands counterfactuals (boys) and demands asking one degree back if the experience really was random or was sought after (so the orientation precedes the experience and is only confirmed by it, but not created by it). "I was minding my own business when she flashed me" is not the same as "we were playing doctor and she told me it hurt between her legs".