In addition to the sexual connotations it may have in a dream, the navel is a symbol of connection. It is the link between your own body and the maternal belly, and, by extension, contact with the earth, the darkness, and the unconscious. It can be interpreted as the desire to distance yourself from those who are not family, or with the aim to explore unknown lands. It also alludes to a desire to procreate.
Gallery of dreams
Do animals dream?
Research conducted by various scientists show that animals do experience dream while sleeping. They also experience similar sleep stages like human beings - REM and Non-REM. If you have noticed a dog sleep, it might sometimes wag its tail, this indicates some response to its dream. A study was conducted in a cat by removing a part of the brain stem, which will not prevent it from reacting to the dream during REM. It was noted in some cats they were aggressively chasing mice as in reality.
Sleeping can help with the overall well-being than avoiding irritability. A lack of sleep can easily contribute to depression, but having a good one could easily change your mood or alleviate your anxiety. With a good night's sleep, you'll surely have emotional stability and balance.