If you dream someone is spying on you, it may mean the approach of danger from people you do not know much. You'd be surprised how much they know about the details of your life.
Had a dream that you are being spied a familiar person - in reality you have to watch out for him. Perhaps against you he has some secret evil intentions.
Themselves spying on someone - it's a warning: spy passions will not bring you to the good. Engage better their own lives. On the night of fast day this dream could presage the emergence of desire to move to another place.
Dreams, as you peek in on a couple having sex - hence, hidden desires overwhelm you, and not necessarily related to the satisfaction of physiological needs.