If you have rarely been able to actually find the answer, why do you assume prostitute? Sounds rather misogynist to me.
In the particular game of “prostitute or daughter” (also sometimes prostitute or son, although much less common) we try to pick apart clues that might inform the guess. Places we’ve seen them. Actions toward each other. Actions when apart. Etc etc.
The assumptions about the dichotomy in the potential roles of women underlying the game are literally a textbook example of misogynist gender images.
It’s also worth noting that these aren’t absolute characterizations but probabilistic. In no part of the game am I making some belief that the young women must be one or the other. But sadly/comically usually old rich dudes with young women who aren’t their daughter and they are acting romantically, it’s usually a prostitute, hopefully a consenting one.
It’s quite possible that I’m wrong in that maybe they’re married without rings or whatnot, but there’s no harm as they don’t know I’m going through this thought exercise, and I’ll rarely know if I guess right.
Sure you do, and while it is not particularly plausible that those would be the most probable—even from the categories of “family members” and “people doing their job by being there”—it is a perfect example of the Virgin-Whore mindset.