It could be that his big smile shows his confidence and ease. She is attracted to that kind of positive energy that comes with his big smile.
His big smile might be very contagious. When he smiles, it just makes her feel happy and positive too.
Perhaps she was in a gloomy mood all the time. One day, she saw his big smile which was so bright and contagious. It was like a ray of sunshine breaking through the dark clouds in her heart. So she started to long for that big smile to be around her more often.
It could be that she has a penchant for the extraordinary. Black roses are not as commonly seen as other colors, so her love for them might be a way of expressing her individuality and her love for things that are a bit different from the norm.
Maybe the story was very inspiring or exciting. It could have elements of adventure, mystery or great achievement that attracted her.
She might be in a difficult situation. For example, she could be facing a financial crisis and he is known to be wealthy or good at handling money matters. Maybe she has lost her job and has no other way to support herself or her family.
Perhaps she has a past trauma that makes her uncomfortable in the light. Dancing in the dark becomes her way of coping. In the fanfiction, she might meet a kindred spirit who also has a connection to the night and dancing. They could start to explore their shared love for this nocturnal activity together, and through their relationship, she begins to heal from her past.
It could be that she had positive experiences with big tall men in the past, like having a great time dancing with a tall partner or feeling comfortable being hugged by a big man. These experiences might have led her to prefer dating only big tall men.
One possible reason could be hormonal imbalance. For example, an overproduction of prolactin, which is the hormone responsible for milk production, can lead to lactation. And hormonal changes during puberty, pregnancy, or certain medical conditions like pituitary gland disorders might cause breasts to grow larger than normal.
Genetics is a big factor. Just like how we inherit certain facial features or body shapes, nipple appearance can also be passed down. Hormonal changes during puberty or pregnancy can also cause the nipples to become larger or more puffy. For instance, during pregnancy, the body prepares for breastfeeding, and hormonal fluctuations can lead to changes in the breast tissue, including the nipples.
One possible reason could be for self - expression. The gay individual might feel that crossdressing allows him to show a different side of his personality that he may not be able to show otherwise. It could also be a form of art or performance. If the master is involved in the arts, like a director or a painter, the crossdressing could be a way to contribute to the creative process.
She might love it for the expanded universes. Fanfic often takes the existing fictional world and expands it further.