Hmm, in my head, I model conversation as a game of who can get the mine the most "intimacy", if you will, while revealing the least about oneself. So risque topics are, as the adjective suggests, high risk, but also high reward. Correspondingly, small talk is a lot of low risk, low reward back-and-forth. You don't have to be intimate with a stranger, but you need to stick your neck out if you want to progress beyond…
Trying to get the most out of another while giving little or nothing seems like a strange and rather mercenary way to approach interpersonal interactions. Could you explain how you arrive at this mode of communication?
I know analysing social interactions is seen as a rather, if you will forgive the term, "autistic" (or worse, sociopathic) way of looking at things , but some people do not have the natural capacity for social interactions that the vast majority of the population enjoy. I myself have wondered for years if I lay on the autism spectrum before getting diagnosed with ADHD and so all this I had to learn explicitly from years of observation.