According to his posts on that tomgirl forum, when Chris decided to use the ladies bathroom, whatever little common sense he still had by then made him ask a "gal-pal" if that would be appropiate. Gal-pal's advice was "follow your feelings" or some crap like that.
I always asumed that this gal-pal was some troll who still had Chris fooled, but....
...If it was actually Anna? Could she be stupid enough? Or considering stuff like when she joked that if he went to jail at least he wouldnt die as a virgin, she may even had a "I know its a dick move, but I wanna see what happens" moment and gave retarded advice intentionally.