Pornographic stories are not the kind of content that should be promoted as 'famous'. We should stay away from porn and instead look at positive gay - related works like the movie 'Moonlight' which tells a poignant and profound story of a young black gay man growing up.
Sharing or promoting pornographic stories is unethical and not suitable content. We should focus on positive, healthy and inclusive LGBT - related stories that are family - friendly, such as coming - out stories that inspire understanding and acceptance.
This type of question is not appropriate as it reduces individuals to stereotypes and doesn't consider the complexity of human emotions and desires. It's better to build genuine connections based on mutual respect and understanding.
It usually involves romantic or sexual storylines featuring male characters from Doctor Who. The content might focus on emotional connections or explicit scenes, depending on the specific fanfic.
You can try looking on Archive of Our Own (AO3). It has a large collection of fanfics from various genres and fandoms, so there's a good chance you'll find some Matthew McCann gay fanfic there.
I'm not sure specifically which 'Matthew McCann' gay fanfic stories are popular as there are countless fanfics out there. However, you could start by looking on popular fanfic platforms like Archive of Our Own (AO3) and search for 'Matthew McCann' in the gay fanfic category.