The significance could be that it encourages readers to think more deeply. Maybe it's a novel that presents complex ideas or moral dilemmas, so readers need to 'think twice' about the events, characters, and themes in it.
Since 'don think twice' isn't a familiar term to me in the context of fanfiction, it might be a unique creation by a small group of fans or an individual. It could potentially be about a relationship that involves complex emotions and situations, similar to many fanfictions. However, the lack of prior knowledge makes it difficult to be more precise.
It depends on the plot of the 'can love happen twice novel'. Some novels are designed to show that love is a once - in - a - lifetime thing, while others explore the idea that people can grow and change, and thus be open to new love. If the characters in the novel are complex and evolving, then it's very likely that love can happen twice.
I'm sorry, but without knowing exactly what 'don think twice sex fanfiction' is about, it's really hard to recommend similar ones. There are so many different types of fanfictions out there, like those based on popular movies like 'Star Wars' or 'Harry Potter' fanfictions that explore different character relationships and storylines.
One common theme is friendship. Since Twice is known for their close - knit group, fanfics often explore the deep friendships among the members. For example, stories might show how they comfort each other during tough times.