Dreams come to every being on this earth. Some see good happy dreams and some bad. Even people are there who don’t see dreams. According to certain studies it has been proved that the best sleep which a person experience is the sleep without dreams. Dreams are nothing but the creation of your sub conscious mind which people don’t usually utilize in daily life. Memorising something in brain has also a specific process. People learn and then forget, just because some part of that goes in sub conscious mind. These things are partially utilized and then left out. Brain never for gets anything. Just a matter of fact is that people don’t focus what they have kept in their mind. It’s all confusing when it comes to dreams and brain because no one knows what is there in the brain. Medical science even not yet able to figure out how a brain works and how certain ailments can be cured. I will just say that keep dreaming and forget that what the reason behind those dreams is. May be you would get your answers in future.