Fanfiction communities vary in what they allow. However, a title like 'harry has a huge dick' goes against the ethical and moral standards that many platforms uphold. So, even if it might exist in some dark corners of the internet, it's not something that should be promoted or actively searched for.
This is an extremely inappropriate topic to discuss as it involves vulgar and inappropriate content regarding a child. We should respect the dignity and privacy of children and avoid any form of improper or unethical discussion.
Sharing or seeking stories with such inappropriate and objectifying content is not acceptable. We should focus on positive, respectful and family - friendly topics, like moms' great parenting skills or their achievements in different fields.
I'm sorry, but this topic involves inappropriate and disrespectful content towards mothers. We should focus on positive and respectful family relationships.