Having a cheating dream could be a simple sign that the uncanny object of your desire has personal qualities that you admire and wish you had yourself.
Boss Sex
You’ve never had a single sexual thought about your rather unattractive boss, so why is he the star of your naughty nightmare? The answer is simple: you envy his position and the power and prestige that comes with it.
Best Friend Sex
Regardless of the gender of your best friend, your dream is simply a visual expression of your shared intimacy, and as we know, real-life intimacy is not synonymous with sex.
Celebrity Sex
As we’ve mentioned going over our pickup artist secrets, being associated with celebrities increases your social proof and, subsequently, your desirability and power. Celebrity sex dreams are more narcissistic in nature, highlighting your desire for attention or fame.
Stranger Sex
Anonymous sex dreams are your mind’s way of expressing your desire to flirt with the unknown, get out of your comfort zone and live life on the edge.
Surprised by how little your sex dreams have to do with, well, sex? We thought you might be!
Source: http://www.picobong.com/en/blog/understanding-the-hidden-meaning-of-sex-dreams