Yes I am quite sure that this is quite natural and nothing to worry about. If the concern is that you are sleeping and waking up with other men In a dorm situation and will fee embarrassed, don't worry you will all, be in the same boat! This really is nothing to worry about and it will continue to some extent for many years. One of the parameters on which impotence is measured is if there is no erection in the morning, so that should tell you something!

Conditions such as diabetes and multiple sclerosis may produce nerve damage which affects your ability to develop and keep an erection. Surgery, many injuries, and cancer radiation treatment to the pelvic area may cause some damage to the nerves running to the penis. Problems with those small blood vessels which supply blood to the penis can be a cause of erection problems. For example, hardening of the arteries - also known as atherosclerosis - may make it challenging for a man to have an erection. Less well known is the fact that long-distance bicycle riding on a hard, narrow racing bike saddle may increase a man's chance of having an erection problem due to damage to the blood vessels leading to his penis.

Well I think it is certainly true that the things we think about during the day can manifest them in our dreams, it is the sub conscious way that our bring deals with the processing of such information. However, an erection in your sleep is more a physical thing and less a mental reaction to anything, especially in younger men. It is when you stop having them that you need to worry!