My dream made me ship something that I never even thought of shipping before. Sure, same media and both important characters in that medium, but it just hadn't crossed my mind yet. I don't mind it, but logically I don't ship it and yet subcosciously I have a very strong emotional connection to it because of one small dream where it wasn't even the main focus but a sideplot. Just like that, one dream further and bam. It amazes me how strong dreams can be.
It reminds me of a dream I had half a year ago where one small second of a dream caused a pretty prominent phobia of mine to just... nearly die out. It eventually came back, but I can't believe that one second of a meaningless action, not even dialogue, in some dumb dream with no plot was far more effective than months upon months of pondering and reasoning with myself. The mind is so amazing and I can't wait until humanity has discovered even half of everything there's to know about it!