common thread between dreams?

Date: 10/8/2016

I recently woke up from a dream where I could breathe underwater and I had overwhelming flashbacks of 10 different dreams (or more) where I was able to breathe underwater! None of the dreams were connected in any other way, and none of the dreams focused on the fact that I could breathe underwater. It wad just a small detail in the overall dream(s). Do any of you have a common thread that links your dreams together even if they are otherwise unrelated? I even remember testing before while in a dream whether I could breathe underwAter so I would know if I was awake or not.