One of the strangest I've had recently involved my husband developing a sudden interest in BDSM, but only with men involved (not me). I accepted his decision to try it, but he kept asking me for advice, which was getting me depressed. However, I would answer his questions. The problem was that he wouldn't ask me directly, but would write out his questions on a white board and I had to answer by text message, even if we were in the same room.
Sex dreams are rare for me. Of the few I've had, there are two that stick out in my mind as being the weirdest, both of them occurring a few years ago while I was in high school. The first involved me masturbating in class because I didn't feel like doing any schoolwork. The other (and a fucking scary one) was about a man raping me using a live snake.
I also used to have a lot of dreams about shopping for sex toys. Then I found Eden and those dreams stopped.