I was talking to a buddy at work last night about this topic, and he said he has had dreams about going to church and everyone wore roller skates. I immediately responded with my quick wit.... Holy Rollers huh?
I've had dreams about being really thirsty, and no matter how much I drink my thirst is never quenched. I usually then wake up with a parched throat in which I go and get a huge drink of water.
Then I'm up an hour later going to the bathroom for other reasons.