Skip quiz
When asked to choose a body part to stimulate, enter capital H (ecchi) by pushing SHIFT/CAPS + H keys to skip the quiz which is very difficult to beat.
Body stimulation quiz tip
The kanjis for "rationality" diminish by entering the numbers between 1-6 by certain order. You have to do so 4 times within 20 goes or the game is over. Some combinations even restore the kanjis back. One of the correct sequences is: 1234 234 5324 12456333