Dreaming about a non-specific man represents your masculine characteristics such as dominance, strength and aggression. You may need to draw on these qualities to help with a situation in your waking life, or they may simply be lacking in you.
If your dream is about a specific man, think about the characteristics you associate with him and these may be ones that you feel you should incorporate more of in to your character.
If you are a woman and dream about being in the arms of a man this represents your desires to be safe and secure.
You may literally be looking for a man to look after you, however you could also view it as an urge to improve your own sense of security and become more contented with your life.