There's a difference between "telling the truth" and "having no filter"
I'm sure others have pointed this out, but still, it's my biggest complaint of this film.
If you're asked a question, sure, in this fictional world you must answer truthfully....
...but that doesn't mean you just volunteer every little piece of information willingly, even walking up to strangers and telling them. Even the most honest people have social filters and understand to keep things to themselves.
You wouldn't walk up to someone and say "If I could be a stripper, I would, but I'm not attractive enough" ...that's just... bizarre. Just like JG's character doesn't need to say "I was just masturbating" unless she was asked "what were you just doing?"