It is not an appropriate description. This phrase combines dating and sex in a way that is not suitable for general conversation. When discussing relationships, we should use more civilized and respectful language.
The phrase'she dates big men sex story' is a bit of a mess. It seems to combine the idea of a woman dating men who are 'big' (which could mean various things like tall, broad - or having a large presence in some sense) with something about a'sex story'. But this is not a well - formed or appropriate way to talk about relationships. We should focus on healthy, respectful ways to discuss relationships rather than using such ambiguous and potentially inappropriate phrases.
She dates him perhaps due to some aspect of their sexual relationship or attraction. But this is a very general and more acceptable way compared to the original statement.
No, it's not a common phrase at all. In normal English usage, it seems rather strange and not a typical expression you would hear in everyday conversation or see in general writing.
No. Such content is vulgar and inappropriate for public sharing. It violates moral and ethical norms and may also be against the rules of many platforms.