I also had the problem with the ask interaction causing the furious state.  For some reason, there are a few of my neighborhood Sims that go to every downtown lot as NPCs when I visit with another Sim.  I had a Sim innocently ask another Sim something, and her crush (they weren't married, engaged, or in love) became furious at her, and the relationship plunged into the negatives for both daily and lifetime.  The flaming thought bubbles were amusing, but the roaches caused by the knocked-over garbage can were not.

I'll have to try that, I was wondering how to get a married couple to go downtown.  This expansion does seem to be geared much more towards the single Sims, but I guess that's to be expected.  Just the same, I've been loving it so far.

I too have noticed that the turn ons/turn offs seem to do little, if anything at all.  I haven't gotten too much playing time in, but at least seven times I've had a different Sim look for a date and the turn ons don't match who they find attractive, or who the matchmaker finds for them.  I suppose that the attraction is based more off of their aspiration/astrological matchup?

Plus, it seems that all couples that I had made before Nightlife had the double-lightning chemistry.  I don't know if that was intentional, or if I've just gotten lucky with the Sims I have made.

The furious state is very funny, and it does seem to be random sometimes.  I had one Sim thinking of the cow mascot in a flaming thought balloon, which I found to be especially amusing.