We don’t usually remember them. We have dream fragments but don’t usually remember entire dreams. And you probably only remember one when you will have 5-7 full dreams a night. You can train yourself to remember if you dream journal ( I did this for a while iny teens) and gave it up.

Number one they weren’t all that interesting in aggregate. Just bizarre and disturbing (most dream content has a negative emotional quality to it). Second you can get really good at remembering them, and it was taking an hour every morning just to write them all down.