The theme of sacrifice can also be seen. Sometimes in these fanfictions, they have to sacrifice their normal relationship or something else they hold dear in order to be together and have that first kiss. It adds an extra layer of drama to the story.
There's also 'Unexpected Affection'. This fanfiction takes a different route. It places Sam and Dean in a situation where they have to confront their feelings in a more urgent way, which results in their first kiss. It's a really engaging read with great character development.
The writing style matters a great deal. Vivid descriptions of their emotions and the environment around them enhance the reading experience. For instance, when they finally kiss, the description of their feelings - the mixture of fear, excitement, and love - can make the moment really come alive for the reader.
Some writers might describe it as a passionate and long - awaited moment. For example, 'Their lips crashed together, all the pent - up emotions exploding in that one touch. It was a kiss filled with years of unspoken love and desire.'
One common plotline could be that it happens during a moment of extreme danger. For example, they think they're about to die and in that intense emotional moment, their feelings just spill over and they share their first kiss. Another could be that after a long period of denying their feelings for each other, a big argument finally breaks the dam and leads to that first kiss. It might also be that they get influenced by some sort of magical or supernatural force that makes them realize their true feelings and kiss.
You can try Archive of Our Own (AO3). It has a vast collection of Supernatural fanfiction, including ones with Dean and Sam having a kiss. The site has a great search function that allows you to filter by tags and ratings.
There's 'The Unspoken Love' which is set in an alternate universe where the Supernatural world has different rules. In this fic, the kiss between Dean and Sam is a turning point in their relationship. It's a very emotional read as it explores their feelings in a unique way.
A common aspect in such fanfiction could be the build - up of emotions. Dean and Castiel have a complex relationship throughout the series. Their first kiss might be a culmination of unspoken feelings, perhaps after a dangerous situation where they realize their true feelings for each other. It could also be a moment of great vulnerability for both characters, as they break through the barriers of their friendship or comradeship.
One popular 'Sam and Dean kiss fanfiction' is 'The Unexpected Bond'. It delves into an alternate universe where their relationship takes a more romantic turn. The story is well - written, with great character development and an engaging plot that keeps you hooked from start to finish.
Another theme is the building of their brotherly bond. When they face difficulties for the first time together, they start to understand each other better. In some fanfictions, it could be a first encounter with a powerful demon where they have to combine their skills and trust each other completely. This is often a turning point in their relationship and is a frequently explored theme.