Spreading your arm towards people, could show your generous and caring nature. Your left side being associated to feminine qualities,like nurturing and support, and your right arm being more daring and outgoing and reflecting masculine characteristics.  Showing your arms agressivly means that you feel the need to protect your interests and show more assertiveness.  When you dream that you have lost your arms, it reflects your feeling of failure, inability to take care of yourself and of others.