"The notion that they dream of bathroom stalls, which are often found in public, further indicate that they are concerned about how others might feel and how others will perceive and judge them. They are feeling ashamed and fear that the situation might get messy should they make their feelings known. They don't want to cause trouble and as a result keep things inside. Their emotions have been pent up for too long and hence the dreams recur until they are released or acknowledged."
"To dream that you are urinating, symbolizes a cleansing and release of negative or repressed emotions. Urination is symbolic of having or lacking basic control in your life.
To dream that you are urinating in public, symbolizes a lack of privacy in your affairs or your need to make a public apology or confession. "
I didn't know that my emotional state of mind is so repressed and stifled that it has been showing signs in my dreams. I've been having this kind of "filthy" dreams recently (though not very often) and the "filthiness" is disturbing me.
I know there are some negative feelings in me that I need to let go and to make peace with my inner self.