As for Amy in 12 Days, you will have to experiment and know the fetishes and turn-ons of your boyfriend to gain the maximum amount of money, while keeping enough love points to succeed. For instance, the boyfriend in 12 Days has an exhibitionism fetish. He likes to show Amy off, you should use that and gain love points back.Well, it kind of broke my heart to have Amy doing the poker night.
I have to replay it and decide what to do with Clare. I will try to have her pure as long as i can. Though the game is rather short to see that, i think.
So far i did not dare to say often no in 12 days.... because i feared it would end the game. I chickened out.
As for Misfits, I think there are ways to keep Clara pure or nearly pure. For instance, during the date in the Ice Cafe you can gain good points if you are polite, nice and understanding of her position. More pure points than corruption points if done right. So Yes, I think we can get a Clara in the end who is rather pure or a Clara which teases the hell out of others but stays faithful or a Clara who likes to be shared or a full slut, to name some possible ends.