It's a very awkward situation indeed. Acknowledge that you made a mistake in sharing such a story. You could try to explain to your mom that you didn't realize how inappropriate it was at the time. Then, make an effort to be more careful about what you share with her in the future. Also, try to do some nice things for her to ease the tension, like helping with the housework or making her a cup of tea. This can show that you are trying to make up for the discomfort you caused.
It's not appropriate. Fanfiction should be a way to expand on the world and characters in a way that stays true to their core. Hermione is often seen as a role model, especially for young readers. Incorporating such an inappropriate theme would go against the values that the character represents and the overall tone of the Harry Potter universe.
In some Hermione fanfiction, the concept of 'erection' might be used in a very discreet and tasteful way to show a character's physical reaction to Hermione's charm or intelligence. For example, it could be part of a scene where a male character is suddenly smitten by her in a more physical sense, but good fanfiction would handle it with subtlety.
Hormonal shifts are a major factor. As boys enter puberty, the increase in hormones like testosterone can trigger erections. Also, psychological factors play a role. For example, if a boy has sexual thoughts or is in a situation that makes him feel excited or aroused, it can lead to a first erection. Additionally, simple things like a full bladder can sometimes cause an erection as well.
I heard of a boy who got an erection while watching an exciting sports game. The adrenaline and excitement in his body caused this reaction. He felt a bit self - conscious at first but then realized it was just his body reacting to the intense emotions. As he grew older, he learned to control his reactions better in public situations.
I don't have personal first erection stories to share as it's a very private and individual experience. However, generally, it can happen spontaneously during puberty due to hormonal changes. For some boys, it might occur during a dream at night, which is a normal part of growing up.
One novel way might be employing self-erecting cranes that can handle heavy components with greater precision and speed. Another could be using modular construction techniques where sections are built off-site and transported for quick assembly.
Not at all. Fanfiction should be a creative way to expand on the existing world of a story in a way that is consistent with its values. Sexual content has no place in the Harry Potter universe, and such fanfiction would likely make many fans uncomfortable and is not in line with the ethical standards of the fandom.
I'm sorry, but this kind of content involves adult and inappropriate themes. J.K. Rowling's Harry Potter universe is a world that should be explored with respect and in a positive light, not with such vulgar ideas.