Ok, I was just going about my business today reading through the forum (Random: please pardon any spelling errors, my keyboard is sticking and it's sometimes skips letters I press even though I made sure I pressed them...) ANYWAYS I was just reading through and found the topic on Thorton Wolff (
http://www.carls-sims-3-guide.com/forum/index.php?topic=645.0;topicseen), I would've said something about it, but it was a little off-topic... so I just decided to post another topic and if I put it in the wrong area I'm sorry you may move it to where it belongs.
Anyways to quote Saltypaws from that topic "I had a problem with Wolff too, I even changed his traits and I guess they were imbedded, LOL. I had another couple that I was trying to get together, no matter what I did, could not get passed flirt stage, well, I did finally get to first kiss and all it said is that he thought she was being friendly, maybe some sims just do not like someone and that is that."
I have once had a Sim teen who moved into the house next to the Alvi house in Sunset Valley. I decided that she should make friends with the teen son (and punk) VJ. I had him come over (I like playing fate so I had already decided that I want her to marry someone else.) and they talked, only I didn't need to really tell her to do anything, they started just talking all by themselves, then out of no where, he kissed her, not the "first kiss" interaction, but a full on kiss! I was so shocked! Then I decided to mess with traits a bit and move her into a new neighborhood next to the Alvi house and when they became friends I had to force them to talk. I'm slowly starting to believe that there is some type of chemistry in the Sims that makes someone like someone else a little more then they would another. Just a thought of course