Well, it could be a story where a girl was involved in a person's life in a way that led to their transexual awakening. She might have introduced the person to a community of transgender individuals. Through this exposure, the person saw that it was possible to live as their true self, as a transexual. The girl's role could have been as a connector, a friend who opened the door to a new world of self - understanding and identity exploration.
A 'girl made me a transexual' story might be about a girl who showed unconditional love and acceptance. Suppose the person was feeling different from their biological sex but was afraid to admit it. The girl, through her kind gestures and non - judgmental attitude, made the person feel safe enough to consider the possibility of being transexual. She could have been a role model in terms of self - acceptance and authenticity.
It could be about a girl's influence on one's gender identity exploration. Maybe she was very open - minded and her views on gender fluidity made the person question their own assigned gender at birth. For example, she might have talked about how gender is a spectrum and not just binary, which planted the seed in the person's mind about being transexual.