First, what on earth does a likelihood of 2, or -3, mean? The graph is a bit puzzling.

Second, even those who master those "subtle social cues" (which have the important feature of plausible deniability) have to learn them at some point, and nowadays the price of error is extreme.

So, just as airline pilots "fly" in simulators, I suspect that someday people will have to spend time with something several generations improved over current sex robots learning to have a relationship before trying it with an actual human.