I wasn't sure if you would answer me, so i didn't bothered to print them, but I'll try to print them, anyway I'll tell you what i know.
First: with male char, if you ask to know more about a npc some times in a row, and they refuse to tell, it opens a message saying that an exception has occurred, but if you ignore it, the game goes normal anyway. It occurred repeatedly to me though. I'll try to print this one when i see it again.
The second: if you ask them they taste in sex, there's no dialogue and you just gain 5 love points instantly. My gf said that sometimes she loses 5 points instead, but to me, i always gained.
So take a look at this, even if it helped me a lot to gain more love points, i guess it's better to solve it. hehe