Differences...

I'm not exactly sure how to put it, so I'm going to be a bit out-of-sorts here:

Heidi and I had just finished... being together... and we started talking about the differences between men and women. She mentioned the joke that Jeff Foxworthy uses, about men being like bottle rockets and women being diesel engines. I mentioned that I had never been as... stimulated... as I was with her. She and I discussed the issue for a few minutes, and then she asked if I was coming to bed. I asked if she was tired, and she replied "a little bit, but I also don't want to have an argument, which is where I see this heading". I didn't feel as though an argument was in the making, yet I kept that thought to myself, wished her good-night, told her I loved her, then shut off the light and closed the door.

Now, the query I posit is this:

Why do women always see the worst outcome for a given situation?